I love to sniff. The musky scent of male ass is a very powerful aphrodisiac to me. Quite early in my life, I discovered that smelling my fingers after playing with my hole while jacking off turned me on tremendously: I often masturbated smelling my worn briefs, and I had intense orgasms sniffing my teen juices. Nowadays, burying my nose in my partner's ass while deliciously rimming him drives me wild.
I also enjoy sniffing and licking sweaty pits. I often ask my boys not to shower, especially after a workout, so I can fill my nostrils with their scent. Intoxicating.