i wouldn't tell him about it for a long time. as for the cuts, maybe not let him see them at all? i mean, if they're not in an obvious place (in other words, usually covered by clothes) then there you go, don't do anything that would result in clothing removal. two birds with one stone, haha.

and gonna say this right now, if he's pushing for sex and isn't willing to go slow like you ask, it's not a good idea anyway. that trumps any good qualities if he's not willing to listen. and do not say "well i was letting it go that far" or some other BS like that, because he ought to have enough respect for you that he not let you go that far.

i personally wouldn't have anything to do with him in that way if we were working together, but that's just me and i would absolutely hate it if i were in this sort of bind.

figured i should say that you can take any of this with a grain of salt, doesn't matter, as it's all really just my opinion based on my own experiences.