Check out Scicurious' report on a recent research paper entitled "Spontaneous Ejaculation in a Wild Indo-Pacific Bottlenose Dolphin (Tursiops aduncus)" — in which we learn that dolphins can masturbate (yes, even without hands), but, frankly, they don't always need to. That's because male dolphins can have what amount to wet dreams … sudden, unexpected orgasms that happen in their sleep. And, um, there's video. If you're into that kind of thing.