I use a black luffa. I've used a luffa since like 2001. I remember when platoon sergeant was talking about it and said men don't use luffas, they use a wash cloth. We called him bullface because his face was all screwed up and deformed from being stomped by a bull. He had a fat ugly wife and was a complete asshole. I hated that guy.
On the other hand my Platoon sergeant before him also had a fat wife, but she was an absolute sweetheart, great cook and always smelled great. This is actually where I get my cold fat or warm fat thing from.

But yeah, who doesn't use a luffa, you probably smell like shit, literally. Wash your ass.