I love a guy on his stomach, preferrably a str8 buddy I'm giving a massage to, and I grasp both cheeks in each hand and spread it wide to view the beauty of his hole before he shakes with pleasure from my probing tongue...
Oooohhhh yea, love masseuse or masseur playing with my ass during a massage. I will usher on hands and knees to facilitate easier access and allow anything they want to do to me! FN HOT
My favorite way is a guy squatting on my face facing my feet. I've found that his hole is more relaxed in that position and i can get in deeper. A rim chair can make it easier for him to squat there longer but with or without the chair this is the best way for access.
Additional bonus for me: it makes me feel more...degraded or used...which i like :)