[ladyb08]

I guess it would depend on the relationship you have with the person, and what you all have already established with one another. Just be honest up front. If you say what you want and/or need before the "tempting situation" even comes up, I think that the chance lessens of either of you doing something not desired...

Then again, this is the opinion of a young lady who's never experienced this sort of situation... Most of them go about their business after I tell them, and I feel I'm better off without the runaround.