interesting responces. I won't lie I have done it and more then once, and I have no shame in addmitting that. yes its dangerous and risky but that is part of the fun in it. Also just so I clarify when I say stranger I don't nessasarly mean someone you literally meant two minutes ago of course you need to have a little bit of conversation first.
Once, many years ago. A guy I met in a bar. It was one of the most passionate nights I have ever had, and I never even knew his first name. But these days?!? Never, way too risky!!!