I wear boxers, so things hang kind of loose. The sack sticks to the legs, and the shaft sticks to the sack. Both are uncomfortable, and I'll usually try to shake a leg and free everything up. I make it a point not to manually reposition myself outside of the restroom though.
When I was a kid I wore briefs, and things constantly shifted and became uncomfortable quite often. I would manually reposition myself multiple times throughout the day, and when I was in 3rd or 4th grade, can't remember which, my teacher caught me doing it and thought I was playing with myself in class and told my parents...
Edited, Oct 2nd 2012 6:30pm by TirithRR