Ah! Yes, that's just what I was thinking in writing to go_back_chief above, that probably a lot of this stuff sounds more pornographic to native speakers because yeah, "cock" is really not something I write easily. You get used to it, of course. If all porn was written in Portuguese you'd probably use the Portuguese word for it more easily, but it would probably always have more kick to it than it would in English. I mean, in mainstream erotica in English, romance novels and such, I don't think you'd ever see the word cock ever. In fact that's one of the jokes about them, that they come up with so many circumlocutions for it.