I watched this whole program on National Geographic entitled 'The Dark Side of Dolphins' and let me tell you, dolphins are total assholes. So here's the deal, male dolphins travel in packs of two. These males want to get laid, and so they trap a female between them and keep her captive for up to a month, having sex with her as they please. If she tries to get away, they will beat her with their snouts and fins. When you see large groups of them it's just a bunch of these two packs of males joining together to keep captive a few females so that they can gang rape her. The females hate it and try to get away but then get beaten up. If and when the female gives birth she won't want to have sex while protecting her young, and so males will gang up and try in some instatnces to kill the baby inorder to have sex with the mother. Bottom line, dolphins are assholes. According to marine biolgoists dolphins could have normal courtship and sex, but the males choose not to they prefer gang rape. Dolphins are assholes!!