I've been to a few (4 actually) bukkake parties. I was asked to attend because, at the time, I was part of a list for orgies, and the organizer was asked to set these parties up. The number of guys was been between 10 and 20, the number of women (they were between 28 and 45) was between one and two at each party. They all had partners who were present. They all really loved to have guys cum all over them. They were absolutely covered in sperm by the end.
This is not something that I would fantasize about. The invitations came in the email, and I'm not one to turn something this interesting (to me) down. I like passionate scenes, and my guess was that the women really loved it. I was correct. The men would stand around the woman masturbating. She would be masturbating too. At first the guys would cum one at a time, but then the momentum and heat of seeing guys spurting would build and guys would cum together. I have to say that each time I did not stop at one ejac. It was hot enough to at least go again one time, if not more. There was never any fucking. Sometimes the woman's partner would hold her or stroke her while she was getting spurted on. The women came at least once in the session, and a few had several orgasms. I can guarantee you that none of the women felt brutalized, forced or humiliated, that was clear from the smiles and laughter as well as the beautiful climaxes.
This is not something I would hunt out, but if invited I would go again. I found the scene strangely exciting to be part of, and to watch.
Let's discount the porn, where its impossible to tell if the girl likes it or not because she is getting paid.