Well, I'm a virgin, so I've never actually done anything with anyone, but I can imagine pretty well what my desires are.
And coming on a woman really isn't one of them.
I think her swallowing would be AWESOME (if she were willing), but otherwise... I'm not sure I'd go as far as to say it's degrading, but just about. If she likes it, that's fine, but it's just not something I'm into. If a woman enjoy it as well as the man, than all the power to them.
I just hate how most of our sex culture is designed around a man's desires, and not a womans, and this is just another example of that. Especially in porn. I hate how every porno ends begins and ends with a blowjob, and just how hateful and degrading the talk is. How every woman that enjoys sex is a slut or whore. Gah.