i didn't play it a long while but had some nasty battle whore, and if i remember correct... holes will stay tight if your stamina > 0 after banging.So I noticed for vaginal and anal the numbers went down the, uhh, looser Lona got. Hands and mouth leveled up with stamina skill I believe, but her downstairs holes actually lose effectiveness with use.
Idk why these guys like holes so tight they bleed with use, but I don't think I'd make someone drink my piss either so.
then again: i didn't play a while