Situational sexual behavior

Situational sexual behavior is a type of sexual behavior that differs from behavior that the person normally exhibits, due to a social environment that in some way permits, encourages, or compels the behavior in question. This can include situations where a person's preferred sexual behavior may not be possible, so rather than refraining from sexual activity completely, they may engage in substitute sexual behaviors.

Source: Wikipedia — Situational sexual behavior (CC BY-SA 4.0)