I've fucked an older guy doggy like this before. He used to suck my cock a few times a week and eventually we fucked a few times. Was awesome sex and I miss him.
I love how the guy shoots a big load up gramps' receptive asshole. Then he pulls out his cum-covered dick and shoves it in the old fart's mouth, who proceeds to lick it clean. Nothing like ass-to-mouth fuck'n suck with a fat old man.