Sexual intercourse (or coitus or copulation) is principally the insertion and thrusting of the penis .. other racial groups," and that "adults using a condom for intercourse were just as likely to rate the sexual extent positively in terms of arousal.
This is an adaptive male tactic because immature mating increases insemination success relative to adult mating (which predicts higher.
In social species, female mating strategies can be constrained by both male and female groupmates through sexual conflict and reproductive.
monkeys during adult copulation and the possible importance of observation of copu- lation for the development of appropriate sexual behavior. The social.
adult mating stock video clips in 4K and HD for creative projects. Plus, explore over 11 million high-quality video and footage clips in every category.