What's the difference between flirting and sex? I'll tell you. Flirting is saying what you want to do to a person. Sex is acting it out. I've had numerous guys on Fubar flirt with me and some of them have even tried to act out their fantasies. Well to all you guys who want to act out your fantanties, enough is enough. I'm married. You can flirt with me all you want to as long as it's harmless flirting, but that's as far as it goes.