I have a handful of guy friends. My husband knows about them, but he doesn't know that I like to greet them with kisses on the lips often. They are always into kissing me back too. I don't do anything else physical with them. I would never cheat. It's just nice to have a little kiss, with a little tongue. Not all guys kiss the same, and it's just nice and friendly, really--much nicer than a hug.