Men like me into ASS are attracted to guys like you with nice lean , strong backs, slim hips, round, blossoming glutes...it's instinctive, from puberty (and I grew up in a beach town...)...I only rim masculine men with hot asses who like that special attention......so many men out here in LPSG who haven't experienced a hungry tongue!
I'm not medically trained, but I believe that rimming a recently cleaned ass is cleaner than kissing someone who has not brushed their teeth in several hours, and has probably kissed other people since brushing.