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
Other sex of the two standard categories. Gender identity, one’s internal sense of being male, female, neither of these, both, or other genders, is something that everyone has, and not everyone identifies their gender as male or female. It is important to note that sex, gender, and sexuality are not the same, and that one does not dictate the other. "Sex" is what you are assigned at birth, and is typically based on physical anatomy. "Sexuality", or sexual orientation, is a person's enduring physical, romantic, emotional, and other form of attraction to others. There are many different ways to describe one’s gender.