If you wear them right I think it can be attractive. Not all the time tho but I think it's fine to wear them. Also if a guy really likes u he has to like u at your best and worst so he won't mind when you wear your sweatpants even if u don't look great
My boyfriend actually loves when I wear sweat pants. It turns him on and I don't understand why. The first time I wore them around him he was so excited. It was weird. He's happy in anything I wear, and he compliments me a lot but for there is something about sweatpants he likes. I only wear them on Sundays when it's laundry day. Sundays are the days that I don't pay attention to my appearance at all. So i don't get what the turn on is, but he loves it. I guess I should be happy that he still likes me with sweatpants, no makeup and my hair up in a pony tail and usually I haven't showered yet.