Well there are a couple of reasons why they might do this and those reasons are
1. Because their not happy in the relationship that their in at that moment,
2. Just to remind them of old times.
3. Or to do disgusting things in front of like (masturbate)
I guess it's to remind them of how their life used to be or their seeing there ex behind your back or still secretly loves her but nothings going on
he needs something to look at when he is in bed with you lol!
Your ex boyfriend may have your photos displayed on Facebook because he has not had the time or may not feel the need to take your pictures off or there is a slight chance he may still care for you.
either he wants something to remember her by or he still got feeling for her
Its mabye because he still feels attracted to her, its normal with puberty and such with horomones.
Because maybe he's insecure and needs to make sure that you dont still have feelings for your ex
just tell your new boyfriend that you still have feelings for your ex and tell your ex that you have a new boyfriend if they really care about you they will understand
dump him he obviously prefers his ex to you!
I am girl and I think if my boyfriend always defend his ex, it will really mean something.Like maybe he is still in love with her! It really depends.On how you act and feel.If you say BAD things about his ex which is actually a lie, and he defends her.IT ONLY MEANS, HE STILL LIKES HER.
Pray and move on...
i wont disturb him
Show her some photos of him giving you a facial.
Put some naked photos of you on has email.
get over it and move on