I have had guys squat and have me sniff the hole first. Then lower onto my face, rubbing their butthole all over my nose and mouth.
"Gonna make your face stink like my hole, that way yo' wife gonna know you been sucking on my ass".
This comes up more often on a "meet & greet" than you'd think. Most potential bulls figure that if you eat their ass on the M & G, you're going to let them pretty much do whatever they want when they meet your wife. And the thing is... they're right.