Summertime, and working/playing outdoors, sweating it up, and things get pretty ripe. When I pull off my shorts I get a pretty heady nose full of musky aroma. After I take a shower the scent comes back pretty quick. I don't know if people around me notice. It's a turn-on while jacking tho.

Anyone else?

Personally, it's not one of my favorite smells. On the bright side, it gives me the added opportunity to hop into the shower and lather them up, which would get me stroking away!

At first it was weird for me, I liked my own up to certain point until I started meeting with a buddy for mutual jerks, smelling his balls up close brought a new dimension to the musky manly smell of nutsack, it was not completely pleasant but after some mutual jo sessions I got used to it. Same as with my armpit smell, I like it and helps me get off when I'm jerking alone.
It also adds to the experience when we 69 or when we take turns to suck each other's dick.