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 in the event of rape or sexual assault, how to get tested for HIV and other STDs, and how to talk with a partner about birth control and STDs." Clearly, there is a disparity between the type of sex education curriculum teachers, parents, and students want and what government policy determines they receive. Another problem for abstinence education is the definition of abstinence. Santelli (2006) states that there is no strict definition of abstinence within the US federal government guidelines for teaching abstinence-only sex education, using a mixture of non-specific phrases, like "postponing sex" or "never had vaginal sex," while