GUYSS: do you think its hot when a girl just wears sweatpants?

My boyfriend loves it when i just bum around wearing sweats, he says its super hot. i thought he was joking but hes totally serious, he says its like the hottest thing on a girl. and he says 'guys (well, the good ones, anyway) all think that'. so GUYS: is this true? if yes, why?! hahaha.