It's the thought of it that guys like. For example. You see some smokin hot girl bend over at the store and she's wearing a little short ruffled skirt and when she bends over you see her ass cheeks hanging out and she's not wearing any panties. Your brain stores this mental picture and later when you get intimate with yourself you'll think about that smokin hottie in the short skirt with no panties on. Her tight ass cheeks, and showing sideways smiley face will be a burnt image in your head and help you to finish the job. The same goes for these guys. They'll save the girls picture, buy her panties and then perverted 40 year olds will beat off to it in their bedroom at their momma's house while she's at church or at the grocery store. Or maybe she's baking them some cookies for a nice snack to get their energy back after it was wasted on chain of events that could have actually taken place if they weren't a pathetic low life dumb ass.