Reason: Good boy gone bad?
Reason: And you thought your ex was bad. This guy's the ultimate Facebook stalker.
Reason: All of your love letters will be in ALL CAPS. Check out the evidence HERE.
Reason: You'll always get stuck with the bill.
Reason: Some girls like to cover up every now and then.
Reason: You'll always get kicked out of the bed for a dog ... or two.
Reason: Your best photos will have, um, inappropriate things drawn all over them.
Reason: Due to, ahem, mercury poisining, he can no longer take you to sushi restaurants.
Reason: He has way too many female friends!
Reason: Your guy should never be prettier than you.