That happens to me sometimes. I always do a few enema flushes but sometimes the cock still comes out a little dirty, especially if the guy has a long cock and gets past my inner ring and deep in my bowels. I'm always willing to suck it clean, most guys are alright with that but a few wouldn't let me.
Freeze at 2:42 and check out that goo! Wish he wasn't wearing a condom, I enjoy getting that on my cock during anal. Bottoms get embarrassed by it but if you tell them it's hot, they often relax and enjoy it too.