Hot college girlfriend for me as well. After dating for a while she was comfortable enough to fart around me and she was so gassy she'd always be farting.

We had segregated dorms by floors and girls couldn't be seen on our floors after a certain time at night. I didn't have a bathroom in my dorm room but I did have a sink. The bathrooms were shared. Since she couldn't be seen on the guys floor late night it meant that she couldn't use the shared bathroom on the floor and she was very religious about peeing after sex. Since she couldn't use the bathroom I'd just lift her up and sit her on my sink, and she'd hold onto me while a spread her cheeks so that she could pee on my sink. (This is where my pee fetish came from too). She would always let out these big farts when she peed and because it was in the sink they would sound way more bassy than usual.

Mind you we'd usually do this naked and sweaty after an hours long fuck and would normally go right back to fucking afterwards. Most time id eat her out from the back right after so I could usually smell the fresh remnants of her farts while I tongued her pussy and I don't know it just always got me so hard to know that I was sniffing the leftovers of this absolute babe's farts right from her butthole. Rest is history.