And other observations of animals getting off:
Unlike humans, animals can’t tell us they’re having orgasms, so we can’t truly know what their experience is like. For the most part, we assume that male animals orgasm
because there’s an ejaculation–though one can happen without the other, they usually go hand-in-hand. (Or something in hand.) The question of female orgasm is, as usual, more hotly contested, though all female mammals have clitorises. …
The male red-billed buffalo weaver is the only species of bird we know of that exhibits orgasm-like behavior, according to Tim Birkhead, a professor in Sheffield University’s Department of Animal and Plant Sciences. Birkhead spent years trying to observe the birds getting down, culminating in a study published in 2001. The buffalo weaver, a native of sub-Saharan Africa, has a fake penis–it has no sperm duct and doesn’t become erect, but when Birkhead and his colleagues manually stimulated a buffalo weaver’s mock member, the bird had what seemed to be an orgasm. As Birkhead described to me via email, “the bird shudders its wings and clenches its feet as it ejaculates– who knows whether it feels like a human [orgasm], but the external behaviour looks like it.” He says the organ is purely stimulatory, but they’re currently investigating its anatomy further.
The Dish 