. . .but I'm sure glad to know it:
amplexus: the copulatory embrace of frogs and toads (and, one assumes, frog mutants, mermen, toad-bat-demons, etc.) in which the male fertilizes the eggs released by the female (or by himself, in the case of Huxley's Proust-Monster).
The best part, though, is that it literally means 'embrace'--so won't you put your loved one (consenting adults only, please) in am amplexus tonight?