Most Helpful Guy
Well those models strip naked and pose provocatively for lots of different men. With you your boyfriend has you all to himself and in a way that could make you more attractive since your naked body can't be bought with money and isn't shared with the whole world.
Most Helpful Girl
It's okay to feel this way, it's normal. Boyfriends are going to stare at other girls-that's gonna happen regardless of how attractive their girlfriend is. Just trust him, he won't do anything with the girls besides stare. If he continues hurting your feelings so insensitively then you should talk to him about it. Make sure he knows you don't mind/care about the glamour shots etc. but that you don't like how he makes you feel when he speaks of these other women.