Regarding the belt issue, I think I may have a possible answer and guilty of doing the same thing. If I wear both dress shirt and t-shirt, I cannot access the Tequila Worm through the hole in the pants.

The dress shirt and t-shirt are a bit long on the torso, so when tucked into the pants they sit pass the cheeks. The only way to gain access is to undo the belt, lift the shirts, do the deed, retuck, and rebelt.

Another possible solution is the man was indeed wearing women’s underwear and had to drop the pants. Anyway, below is a video on restroom etiquette for males. Watch, listen, and learn you nasties.