Animal sexual behaviour however, is proving to be false as, "most hormones don’t influence behaviour directly. Rather, they affect thinking and emotions in variable ways (Azar, 40)." There is much more involved in sexual behaviour in the mammalian animal than oxytocin and vasopressin can explain. It is often assumed that animals do not have sex for pleasure, or alternatively that humans, pigs, bonoboes (and perhaps dolphins and one or two more species of primates) are the only species that do. This is sometimes stated as "animals mate only for reproduction". This view is considered a misconception by some scholars. Jonathan Balcombe argues that
Casual sex their peers are having a higher frequency of casual sex than they actually are, and this is due to vocabulary choice. For example, using the term "hookup" denotes that the sexual activity, whether it is vaginal sex, oral sex, or sexual touching, is casual and between unfamiliar partners. However, it is vague and does not detail what specific sexual activities occurred. This is especially distorting towards others' impressions because 98% of college hookups involve kissing, 81% of hookups involve more than kissing, and only 34% of hookups involve penetrative sex. Studies have also linked this common misperception of peer hookup