Yes Means Yes: Sexual Consent
The issue of consensual sex is often only brought up when there sex some sort of doubt about consenting both people engaging in sex want it to happen. However, consent is a topic that should be discussed whenever you're thinking about a possible sexual encounter. In sex, consent should be the basis for every sexual encounter. Engaging in a sex act without the other person's consent is consenting sexual assault or rape. Every act requires consent. Even if you have been kissing, that does not mean you cannot say "no" to anything further.
Consent to sexual activity
Consent means that both people in a sexual encounter must agree consenting it, and either person may decide at any time that they no longer consent and want to stop the activity. Consenting to one behavior does not obligate you to consent to any other behaviors.
Consenting on one occasion also does not obligate you to consent on any teen penis picture occasion. Consenting means only that at this particular time, you would like to engage in this particular sexual behavior.
The easiest way to determine if a person wants to give consent is simply to ask.
This eliminates the uncertainty of guessing and trying to interpret signals. Someone putting his or her hand on your hand might be a way of indicating that she or he likes what you're doing or a way of indicating that she or he would like you to stop. A person may also give consent non-verbally by actively engaging in the sexual act.