Okay, I think you need to approach this quite sensitively. If you tease him about it, you’re going to ruin your relationship - and his self-esteem. Why Is My Brother Wearing My Underwear? It’s most likely a sexual fetish. Some guys like wearing women’s underwear, which you might find it weird, but that’s still not … Read more

I'm an only child, but if I had a brother and I caught him wearing a bra and panties, that would certainly be a hilarious moment! Hehe.

I would laugh, then give him a slap and tell him to go buy his own!