Re: Oral to completion - how to explain the allure
The same reason why if you're having vaginal (or anal) sex, you want to finish inside her. Men are hard wired to want to deliver their seed inside of a woman, and the orifice you're penetrating ultimately doesn't matter. If you're making love to her mouth, you want to finish in her mouth. Pulling out at climax makes about as much sense as pulling out of her vagina at climax and cumming outside her body.
Now do you cum outside the body sometimes during vaginal and anal sex? Sure, but I'd chance to say that the majority of the time most men finish inside the woman's body. I think if a man is unaccustomed to finishing inside her mouth, it's likely because he's not use to a woman who swallows. So guys begin to think of blow jobs as foreplay, a small pit stop on the way to the main event. But if you are like me and my wife, and view oral sex as a potentially complete, totally self contained sex session, than the entire act feels similar to vaginal lovemaking, and it feels totally natural to complete where you start; in the mouth.