WHY does a GUY do this!!!!?

I agree with this person above, don't live in pasts, it will make things worse like if you are holding a grugde for a revenage?, that guy has piccys of his exes it was before he even went out with you, if you go mad at him over those piccys you are doing is, driving him away, if you really work this relationship out, learn to trust him, and need have good chat with him to make sure he feels the same for you,