Originally Posted by rathebaindc
Because like skirts and panty hose, it's designed to look girly. Like lipstick and tampons, it's designed to fit in a purse, not a back pocket.
Also, yes, +1 for it being a women's item. I've sold a ton of little wallets like this. There is usually a matching purse available too.
Edit: With that said, I'm sure the seller would have NO qualms selling this to a guy that wanted to use it.