Blow jobs and intercourse are totally different to a man both physically and psychologically. With a BJ, a man feels dominated. There's nothing like a man watching a beautiful woman take a penies into her mouth..it's very erotic, because there's so much more that can be done with the mouth. Also, the mouth can tend to the very sensitive parts of a penis the vagina cannot. Remember, just because you get a man to cum, doesn't mean it was a "good" blow job.