Cum drinking basically refers to the term itself-it is the act of a gay man giving someone a blowjob and eventually swallowing his semen that comes out after the stimulation. Cum drinking is one of the filthiest kinks of all times but still, a lot of people prefer watching this over the others. But in porn, there would be an unlimited amount of cums to play with-this is true because gay porn stars have so much experience in fucking that they have loads of cum to unload. In real life, people would have been too tired to do anything after having an orgasm. Therefore a lot of porn includes things to do with cum-such as cum swapping, cum swallowing, and others.
When it comes to gay porn, it becomes all about what you do with cum-cum is the main character in gay porn.
