If you haven't already, you'll want to see Fully Injected Holes. It was just released on DVD. There is one segment where a guy licks his own goo off a girl's ass...pretty gross, but probably not exactly what you were looking for.
You'll also want to check out Action Sports Sex #1 ...probably the best in the series. See the scene with Pat and Shelbee Myne. Pat cums in her ass, then positions himself so he can catch his own load in his mouth while Shelbee squeezes it out...another stomach churning scene.
One of the more notorious scenes in recent memory occured in Let's Get Fucked Please 3 where Bunny Luv makes Erik Everhard lick his own goo off her chest.
That's about the best I can do. As far as scenes with guys eating a cum filled pussy, I can't recall seeing any.
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