How can what goes in between two "consenting" adults be humuliation? If the woman wants the guy to come on her hair, what the hell is the problem? Just because YOU wouldn't do it doesn't make it wrong. Why didn't you just say that it is something that you prefer not to do rather than act like it's "humiliating" for anyone else to do it. That goes beyond an opinion and into judging IMO. And based on what I've seen from you pc, you don't have any cause to be judging anyone.
What I don't get is how that act is so humiliating to you, but surfing around the net posting pics without permission seems to be just fine. I would think that would be more "humiliating" to one of our long haired lovelies than allowing someone to release on her hair.