Isniff sweaty underwear

I find myself drawn to sniffing sweaty underwear. This started one time after I had a workout. I got back from the shower, and noticed that my clean underwear was the same as my sweaty underwear that I had just worked out in - they got mixed up in my locker. I didn't want to put my used pair on again, so I had no choice but to sniff both pairs. Wow. The smell from my used pair was pretty strong, but also a scent that I really wanted to inhale deep. Don't ask me why. Recently I've been comparing the smell of my dirty undies with other guys used stuff that they leave on the locker room bench while they are in the shower. It's amazing how different guys smells are. Is this normal? I mean is it normal to sniff you own sweaty underwear and/or have you ever sniffed other guys dirty undies? What did you think of the smell?

Do you think it's normal?

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