My roommate's girlfriend spends a lot of time at our apartment. Now, I've been in the same room with my roommate and his girlfriend while he was in underwear. I've never seen her in underwear. She hasn't seen me in underwear. My roommate has seen me in underwear. Because we've hung out while my roommate is in underwear, does that mean it's no big deal if I parade around in my underwear while she's here? Just wondering because we're all sharing a room in Acapulco. Boxers and boxer briefs only.