Wow this thread is fucking hot! Love the stories. Pretty exciting to read... gotta say I wanked off to this last night (I like jerking off randomly). I can't believe so many guys are in to this kind of stuff too! I've always had a thing for scents (is it really a fetish!? that's such a nasty word), but I've never really talked about it with anyone.
I suppose I can contribute.
I've only sniffed other guys' underwear a few times, usually when I was in middle school I could just go right for the ass. When I was about 13 my friend and I had a really physical friendship, lots of sports and romping around. Sometimes we would be doing something and I could just put my face right up against his butt and it always turned me on so much. It's not the smell of shit! It's just musk, sweat, and funk. We would have sleep overs all the time and I would almost always end up in some situation where I could smell his hole. I think it was obvious, one time he sat on my lap for a while and another time we were wrestling he just sat on my face, but we were just goofing off. I did steal his boxers once though. I was in his room and he wasn't around and I was going to go take a shower. But I saw a pair of his dirty boxers on the floor, so I picked em up, went in and put them up to my face (sweat/ass smell), and jerked off and put them back later.
Another time, same age, different friend, we were having a sleep over. He had the hottest bubble butt I'd ever seen! I wanted to fuck him so bad. We fell asleep on the floor and he was on his side, and it was dark so I lifted the covers up and put my face by his ass. He smelled soooooo sweet... less funky than other guys. I layed there smelling him and jerking off. I think I did that twice.
Then, when I was 15, I was at summer camp and I made friends with this realllllly hot guy, who was 16 so we all thought he was really cool. I had the biggest crush on him. One time when he was out of the cabin and no one else was around I went over by his clothes and found a worn pair of boxers, with some skids, and damn I still remember jerking off to that and how intense it was. It definitely triggers something primal in me.
When I was like 16, I was getting really drunk with my friends one night and one of them came back and stayed the night. He was laying on his stomach and I got a wiff of him too, which was hot, but it was hard to handle how nervous and horny I was from being drunk...
The only thing to happen since then is when I finally started having sex (college!!) . I convinced my ex bf to let me rim him and he liked it so we did it a lot. He must have cleaned himself a lot before messing around because he never smelled that rank, just sweaty. He's 18 and had such a nice ass though. One time we were laying on the couch and cuddling and I was fingering him, but then it would get difficult, so I'd lick my fingers and keep doing it, and to mess with him I put them in front of his face to see if he'd lick it too (for lubricant) and he was like "huf! no!" it was funny. He didn't like when I jerked off after fucking him (which sucked), and sometimes if I needed to come really badly I'd act like I was going into the bathroom to wash up. So one time I went in and he did have his laundry there, so I did wank to his dirty briefs once.
Ohh I better get laid this weekend. Hope you guys enjoyed the memories!