If we're talking about going out, meeting a random guy, and going home with him - no, never. But if it's not limited to that, then twice - once in college and once about a year ago...though I'd know both for a while before and continued to be on good terms with them afterward.
hmmmmmmm, being able to travel the world more. my navy career was cut short due to injury so i didnt get to see as many countries as i would have liked.