Cum porn is extremely popular in gay porn because men, in general, are quite fixated on orgasm and cumming. The important part here is the post-orgasm where there is already a lot of cum around for the other person to lick and taste. And sometimes that is even more enjoyable in sex! Oral creampie is rather raunchy porn because it is extremely graphic. When you fuck them in the ass or when you are being fucked in the ass, you can see your cum or semen flowing slowly from their assholes.
That is why when someone is sucking you, in gay sex, you just kind of want to watch them lick the cum dripping of your satisfied cock. It is for possessive people who want to declare what is there's, it is claiming what is yours during sex oozing a sense of dominance over the other person.
It is like you own them, they are yours, your property and your person. You always click it, for a reason or two, there is just something hot about seeing a lot of cum in someone's face. Oral creampie is a genre you do not ever want to pass.
