Would you rather wear your husbands underwear for 3 months or live without mirrors for 1 month? You can use mirrors in your car for driving, not for applying makeup or checking your teeth for spinach or anything like that.
Clean underwear, right? lol If yes, then I'd do that for sure. If they would have to be dirty, NO WAY IN HELL.
eta- The more I think about it though, the more disgusting it is. I'm changing my answer.
Meh, I'll still go without mirrors. I can live with being homely for awhile. I really wasn't thinking about all the farting and stuff that goes down in underpants. No thanks.