Majority of the MALE species from Arab/Muslim countries and also India, Pakistan, Afghanistan, etc. DO NOT USE UNDERWEAR/BRIEFS???? (Yikkes!)
I was new in Dubai,UAE working as a Nurse when this local guy came for Intramuscular injection on his buttocks. So, of course, he had to lie down while I prepare the medicine. Then, I pulled up his "kandura" (that thin white robe they traditionally wear upto now)and I was shocked when all I saw was his whole HAIRY BUTT staring right at me!!! Heck, I was so shocked it made me say "Oh, Sh*t!"
Later on, I learned from my colleagues that it's a common thing. They don't wear briefs! Only a white t-shirt under such thin robe. What a sight!