I have no issues with 1 night stands, although they're not really my thing. if I met someone and thought they were relationship material I'd be disappointed if he wanted to get into my pants on date 1. it just suggests that he would do that (or I would do that) with anyone remotely attractive.
and that's not the kids of person I'd want to be in a relationship I'd want.
If I LIKE the guy...and the chemistry is there...then I don't see why not. It may only be a 1-night stand...it may be more. But that is a chance you take whenever you meet someone new. You have to trust your instincts.
I would't personally you shouldn't feel like you have to. If you do make sure you want to and not because your coaxed into having sex.
Men never respect women who do sleep with them early on. If you don't see him again well he just wanted fun only for himself. He would of never made the grade.
If you do and want to make sure you use protection and so does he.