/jp/ - Otaku Culture

In this hentai context, what does "おく" mean? It's not extremely common, but it usually shows up when the girl is really enjoying it and most of the time has a generic follow up like "おく！ 気持ちいい！" or "おく！ もっと。。。！".
For some reason, I've always assumed that it was おく in the sense of "to put/to place" and made the lines something like "(putting it there/like that) feels so good!". But thinking about it, I'm probably a retard and have it all wrong. I've also seen someone translate it as "Ohk!" before, as if it's just a type of moan.
I guess either way it doesn't change the tone of the generic hentai dialog much, but I'd like to know if I've been wrong and retarded about this the whole time.