That is why cum swallowing is a popular practice across gay generations.
It is an act of imprinting, it makes you feel dominant and sexy-like you have put a flag on an undeclared land, you have tainted it and claimed it as your own property. Your gay partner swallowing your own cum is another act of declaring your territory-it is possessive and hot, it makes you feel like you own the person and that that person has your own fluids inside them. But, another widely popular thing to do with cock is to let your partner swallow all of it.
A good number of men also like to their loads of cum dripping through the mouth and lips of their gay partners-they like how dirty it looks, how nasty and disgusting to have their own semen on another's face. Other ones prefer to cum outside, to see the sticky white drip on the butt or thighs of thick gay insight. Men like different things for gays and girls to do with their respective cocks, sometimes they want to cum inside the gay's asshole-fill him with his semen and cream, full and creamy and sticky inside. Cum swallowing is a popular trope in gay sex or even in straight couple sex.