Aside from pure conformity - I could say that people wear underwear because their parents taught them to do so - underwear does help to prevent excess friction between those body parts where it is worn, and the heavier (and scratchier) layers of outer clothing.
none he doesn't wear underwear!!!!!!!!!!! none he doesn't wear underwear!!!!!!!!!!!
Underwear?
Yes, matadores wear underwear.
Yes. You should wear underwear!!
the Romans did not wear underwear but they may wear a bit of leather
longjohns are long underwear, therefore no, wear them on their own.
I prefer underwear, but you can wear either.
It's against the Ordinance for the men to wear underwear.
No. but if its the only underwear you have then wear it, but its not normal
Normal underwear.
No.boyshorts are underweAr
be naked and wear your underwear