Where do you get the idea that we old men walk around naked? I've never done this. Also, I rarely fart. And furthermore, I hate people who stereotype other folks....specially when it is us old folks getting a bad rap! 
There's always some degree of truth in stereotypes. They don't come out of nowhere.
It's not that all old men walk around naked, but all, and I mean ALL, men that walk around naked are old.
I that know why that is. I really don't. And wonder about it every goddamn time I go to the gym when as soon as I walk into the locker room, without failure, some saggy skin bald fuck with the most disgusting physique will be shuffling along completely naked holding a towel. It disgusts me to no end.
WTF? It's like when you reach a certain age you just don't give and goddamn royal husky fuck about anything anymore. Wrap that towel around you for chrissakes! Have a fucking ounce of consideration.