Love sucking on his balls while he's jerking himself off getting ready to cum. That moment when he's ready and you rush to get your mouth wrapped around his head, I feel so much pleasure in that moment. That's when you know you're a true cocksucker, when the voice in your head in that moment tells you "Hurry up, don't miss it. Get to his head so you can taste it all"
The combination of feeling his swollen head, the uncontrollable moaning, and that warm fresh sperm pumping out of his nuts into your mouth is so heavenly. Penis and semen are life.