Because he sees you in them and wants to have sex with you.

Yeah he might wanna fuck you dude. Whenever guys bring up how the shirts bother them and tell you to change its cause they find it attractive and are bothered by the fact that they find it attractive

You're all fucking stupid, it's her borther you idiots. If you've had a sister and you say her shorts make her look like a slut it's because you don't want your sister looking like a slut.

If i had a little sister that wore shorts too tight and short i'd say, "why are you dressing like a slut, get some respect in yourself"

>>17104654
There's a difference between him wanting to fuck you (which I doubt he does) and him being uncomfortable looking at your pussy or panties poking through. Guys are visual: we seriously can't help but look sometimes. I've a little sister, and while I've never wanted to fuck her, having a constant upskirt possibility walking around the house would make me uncomfortable. He doesn't want to look, but he's afraid that he will anyway. So, do him a favor and cover up a bit.

>>17105071
I feel like youre trying to fit into something you arent, I bet you also have incest fantasies