Why do guys think this is y?

last night i slept over with my boyfriend cause we knew cles would be cancelled today because the weather is awful. so we got in between the sheets and ya know...then fell asleep. i woke up this morning and was really cold so i put on his tshirt and flannel shirt and some leggings and went downstairs to make breakfast for us. then when he came down he looked at me and said i looked damnnn y and we ended up doing it again. why would he think that i look y in oversize shirts and leggings? i looked like i was right out of 1987 haha