from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Active participation in oral sex as a receiver; insertion of the penis into a partner's mouth, especially violently.
You might want to do a little research on words like irrumation, for example.
Juvenal derided the idea of married eunuchs and yet almost all of these neutrals have wives with whom they practise the manifold plaisirs de la petite oie (masturbation, tribadism, irrumation, tete-beche, feuille-de-rose, etc.), till they induce the venereal orgasm.