There is this joke website that can track you (not) - anyway this guy known to fool around on his wife, I played the joke on him.
I said, "You DO know that your wife knows where you are RIGHTnow? Give me your number and I'll show you."
As the joke website 'zeroed' in, he kept saying "No, oh no ... no!"
Then the last shot was a couple inside a hot tub.
Can use this for a gag for your swinger friend: