Ummmm....I don't think so....I once flashed my boyfriend when I was in my 20s (he was in a band and was playing on stage at the time) from 'back stage'...he was the only one who saw tho'....and that was just in fun!
I don't think I would do it "in public" for a string of beads. Although I can see how people do, especially during Mardi Gras which is just a big drunken party anyway. It's easy to get carried away by 'the moment' especially if one's inhibitions are lowered by consumption of great amounts of alcohol.