Cum question

I absolutely want them to swallow. It's too much of a bring down and distraction to worry about pulling my cock out of their mouth when I'm ready to cum. My natural instinct is to bury my cock as deep as possible to "inject" my semen as deep in her as possible. I think this is a genetic predisposition in order to "plant" my semen as far into her uterus as possible for procreation purposes. Even though it's her mouth instead of her pussy it's the same instinct going through my subconscious at the moment of ejaculation. Besides, it just feels so much better to have someone's mouth milking the cum from your cock when you ejaculate!!!