The benefits to having a girlfriend are well-documented. But here's one advantage that doesn't get discussed as often as it should. When you have a significant other, you always have someone you can prank when they are most vulnerable. A devious fellow demonstrates this point below.

Dressing up like a robber is a bit heavy-handed, but the results speak for themselves -- and then speak for themselves again in slow motion.  But will the well-executed prank cost him his other girlfriend benefits for any period of time? The prankster did smartly label his sweetie and her two friends as "hot chicks" in the video's description, which should help on that front.