Awwww =(. Well it’s obviously an insecurity issue but if your looking for mechanism’s to actually prevent this type of thought process you just need to adopt a more healthy, happy perspective on these sort’s of aspect’s that unfornately alot of movie’s, music video’s etc do have to a certain degree which on an off note I feel are advertising all the wrong message’s in this day and age and is hardly ever necessary to have in the first place but anyhoo.
Basically what i mean for instance is ask yourself the right question’s rather then the wrong one’s. I’m sure when you take the time to think about it you feel that your b/f is gaining some sort of interest, or fantasy fulfillment from viewing such image’s, “Is he checking her out, why does he look that way at the screen, is her chest more attractive then mine to him, why did he make that comment for in that mood all of a sudden” etc etc all those various insecurity question’s that don’t do you any favour’s and before you know it you’ve become one analytical insecure ticking time bomb!!. But just as ninjacolin briefly pointed out BLOCK THEM ALL OUT. If you actually have persisting problem’s with this just ask your b/f to validate those wavering question’s you have. It will definetely put them all to ease knowing you can trust your b/f’s opinion’s on them.
I understand totally what you mean and don’t misintepret what I’m saying here as I really don’t want you to apply a total apathetic approach to this type of issue, but really just take the time to offer that to yourself with some positive reassurance, and TRUST that your partner isn’t the type of person that would condone that sort of perverbial mentality. Don’t linger on these sort’s of thing’s for too long sweetie they could seriously do harm and strain your relationship with a whole flurry of trivial pointless insecure argument’s before you know it!
To sum it all up. Ask the right question’s to yourself, think positive, be self-confidant and trust your partner and have that open communication whenever neccesary.=^.^=