Boundaries & Consent
Why is consent so important?
Everyone involved genuinely wants the sexual encounter. They are informed, willing, and present in the moment, with the option to opt out at any time.
Sex without consent is sexual violence. This applies regardless of whether someone says “no,” resists, or how the situation appears from the outside.
Consent protects physical and sexual autonomy and makes sex safer, more respectful, and usually also more pleasurable.
In many countries, sexual criminal law is shifting away from “violence is required” to “the question is: was there consent?”
An overview of different approaches to consent
There are different models for thinking about and explaining consent.
"No means No"
"No means no"
In the “no means no” model, a sexual act is considered problematic above all when a person clearly refuses and this refusal is ignored nonetheless. This shifts the responsibility heavily onto the person who has to set boundaries. People who are unable to say “no” due to fear, shame, shock, alcohol, paralysis, or dependence are therefore less protected in this model.
Debates on sexual criminal law have shown that a simple “no” without demonstrable coercion is often not sufficient in legal terms to be recognized as rape.
Nevertheless, this principle has been in force in Germany since 2016. Sex against a person's discernible will is punishable; consent does not have to be explicitly stated, and silence or freezing is problematic but not automatically criminal punishable (§177 StGB, Section 177 of the German Criminal Code).
"Yes means yes"
"Yes means yes"
Affirmative consent requires clear, voluntary, conscious consent. Ideally, this takes the form of an explicit “yes” or other unambiguous signals. Silence, passivity, or uncertainty do not constitute consent. Consent must be obvious, active, and ongoing. It is the responsibility of all parties involved to actively clarify whether the other person wants to engage in sexual activity, not just whether they are “not resisting.”
“Yes means yes” thus sends a strong signal for sexual empowerment, but does not solve the central problems of criminal law. Consent is often nonverbal and situational, so there can be problems with evidence and legal uncertainties remain or even worsen. The model is therefore criticized for the fact that a social ideal is difficult to implement in practice from a criminal law perspective and does little to improve real prevention.
Enthusiastic consent
Enthusiastic consent
Enthusiastic consent goes one step further. Here, it is not enough for someone to be “somehow consenting”; the person must really want it and show it. Signs of this can include a clear verbal “yes,” sparkling eyes, active participation, or self-initiated touching. In other words, it's about palpable enthusiasm.
The idea behind this is that when everyone is genuinely enthusiastic, the risk of boundary violations decreases and the shared experience improves.
This model also presents similar problems to “yes means yes” because it is more of an ideal than an actionable guideline.
FRIES Model
FRIES Model
The FRIES model summarizes key elements of modern consent concepts in one word. Depending on the source, the letters are broken down slightly differently, but the core messages remain the same.
| Letter | Meaning | Briefly explained |
|---|---|---|
| F | Free | No pressure, no threats, no manipulation. |
| R | Reversible | Consent can be withdrawn at any time, even in the middle of sex. |
| I | Informed | Everyone knows what is involved, what practices, what risks, what protection. |
| E | Enthusiastic | Consent is positive, noticeable in the body and visible in behavior, not just “okay, if I have to.” |
| S | Specific | A yes to one action is not a yes to everything else. |
FRIES is easy to remember and makes it clear that consent is more than a single “yes!” It is a continual process with clear conditions.
More about FRIES
- Sexpositiv Stuttgart
to website 
- Sexpositiv Stuttgart
Limitations of the models
Traditional and modern models focus on different aspects, but they also have limitations when it comes to real-life situations. It is not enough to simply list rules; it's also about power, societal roles, communication, and insecurities in everyday life.
“No means no” ignores the fact that many people are unable to speak up in stressful situations or comply out of fear.
“Yes means yes” and FRIES identify these problems, but say little about how people can overcome internal patterns (e.g., the desire to please, fear of rejection, internalized role models).
Enthusiastic consent sounds ideal, but it can create pressure: “I always have to seem super enthusiastic,” even if you are simply curious or feeling uncertain about what you want.
Consent should be about a collaborative approach to sexuality, not just protection from violence.
Behavior-based consent
Consent means mutually agreed-upon sexuality
Consent here means consciously shaping the encounter together, rather than slipping into automatic routines (“First kissing, then…”).
In concrete terms, this means:
We use words or clear signals to communicate what we want, what we don't want, and what we are curious about.
We don't just pay attention to a one-time “yes,” but also to whether the other person is still enjoying themselves as things progress.
We take withdrawal, hesitation, freezing up, or “participating without enjoyment” seriously and stop or ask questions instead of just continuing.
Time for Reflection
A person suddenly becomes quiet and stiff while undressing. What would be a good next step here?
You could say, “I notice you're quiet right now. Should we slow down or stop?”
This gives the person the opportunity to reconsider their consent and express themselves, and, in the best case scenario, both parties can continue with a feeling of confidence.
In practical terms, this means:
Ask yourself: What power do I have in this situation (age, experience, status)? And don't exploit it.
Recognize that some people have learned to fulfill other people's expectations. Actively allow space for doubt and changing your mind.
Consent as ongoing communication
Instead of “asking once” and “answering once,” consent can be thought of as a dialogue that changes and evolves with the situation. This includes simple, clear phrases that you can use before or after sexual encounters.
Communication can also take place in different ways during sex
- Verbal
- Nonverbal
- Directly, by clearly expressing your desires and boundaries
- Indirectly, for example to avoid rejection or embarrassment
Hickman, S. E., & Muehlenhard, C. L. (1999). “By the semi‐mystical appearance of a condom”: How young women and men communicate sexual consent in heterosexual situations. The Journal of Sex Research, 36(3), 258–272. doi.org
Even if you are aware of your own boundaries, it can sometimes be difficult to talk about them. Perhaps you are not sure what you want and find it difficult to express yourself. Talking about consent can be a natural part of sexuality and can also be practiced.
You can find more information on when and how to talk to other people about sex in the section on sexuality & language.
Before sex
What do you feel like today and what don't you want to do?
Are there any no-gos or things that could trigger you?
What kind of protection do you prefer and what is important to you in terms of protecting your health?
During
Is that comfortable for you?
Can I touch you here?
Do you want more, less, or something different?
After
How was that for you? Is there anything we should do the same or differently next time?
Listen to your own feelings
Sometimes it's not so easy to know whether you consent to an activity or not. Here are a few tips on how to approach this.
Personal space
One example is what is known as personal space.
Especially when it comes to sex, whether in a relationship, during a one-night stand, during sex work, or during group sex, it is important that everyone agrees to enter the most intimate distance zone. This mutual, conscious agreement is the core of sexual consent.
Time for reflection
Take a moment to think
How close can or should others get to you?
Is it different during sex?
How can you tell when someone is too close to you?
Questions you can ask yourself:
Trauma sensitivity
Trauma sensitivity
Some people have experienced trauma and may not be able to openly communicate their boundaries. That is why it is important to interpret silence or lack of response as refusal.
Resolving doubts
In a study, young people were asked what resolved their doubts about sexual interactions, and they responded as follows.
- Conversations about non-sexual topics
- Slowly increasing physical intimacy
- Self-reflection
- Conversations about sex and their relationship
- Increased arousal
- Alcohol consumption (sex under the influence of alcohol can reduce doubts and inhibitions, but also carries some risks. You can find out more about this under the topic Sex & Drugs)