Hey, pal, I sucked your dick, and I was happy to do it. But a deal is a deal, and you offered me five bucks. Pay up, or I won't suck you off again. (And I, for one, am hoping that a chance to do so comes up really soon!)
If by "suck off" you mean "hold a hard dick in your mouth til it goes limp" then you were awesome. But that's NOT what it means so you don't get a fucking penny.