I have two embarassing university stories that go with this.
In my first year in residence, I lived in the room just above the college pub...and it was about 8 PM when I had my shower and came back into my room. My friend was watching TV, so I figured since he was preoccupied, I could just throw on my underwear and jeans...and I tell him not to turn around.
After I pull on my underwear and am pulling on my jeans, he says "sure, but you may want to close your curtains. Sure enough they are wide open as people are streaming into the pub...and I'm giving them a red light show! LOL After that, my dorm room drapes remained closed for the rest of the year. LOL
Second story was in my 3rd year...after a Friday night of heavy drinking with my friends, I was woken up by a rapping on my door at like 9:30am the next morning. I went to the door and threw it open, wearing nothing but my underwear.
It was a Jehovah's Witness...he looked for a second, then handed me a copy of the Watchtower, and walked away. That was embarassing after the fact, though not at the time. LOL