Dolphins are great, right? Yes! They're super smart, and playful, and have names for each other, and we should really be nicer to them. If that's all you'd like to think about them, please proceed no further, because you're about to find out lots of other stuff. Like when a dolphin researcher, in addition to giving subjects acid, entered into a long-running sexual relationship with one. And the fact that naval vessels regularly injure and kill dolphins (and whales) with sonar.

Sources: Animation Domination Hi-Def