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
Abstinence-only sex education addition, abstinence programs often teach young people that pleasure in sex is most likely to be found within marriage, and therefore, that they should wait to engage in sexual activity until they are married. Abstinence generally places a great emphasis on the importance of the institution of marriage, which some proponents believe allows young people to grow and develop as individuals. Proponents suggest that comprehensive sex education encourages premarital sexual activity among teenagers, which should be discouraged in an era when HIV and other incurable STIs are widespread and when teen pregnancy is an ongoing concern. Many supporters of abstinence-only