We used to do this anyway occasionally, but it’s even hotter when it’s just a ruin into my mouth. Or even better, when I’ve made him agree to it to get that ruin.
Like that earlier post, suggest it early, when he says no, then tease him enough to make him ask, then, make him beg to do it. Damn, just writing this down gets me horny and I don’t particularly enjoy him eating his cum (besides the fact he’s made me do it for years), but… that process is so hot! I love it.