I have an alpha friend. He isnt a boyfriend or an ownership interest or whatever. Im bisexual and we met because I like giving head. Anyway, he has turned me on to a new thing. Its kinda disturbing but I have gone along with it and he has included some of his friends. Its a term called bukake or bukkake? Basically its men jacking off on someone. Anyhow. Its amazing. A visual of erections, then, in essence, getting rained on by everyone and them laughing and bonding over it. WTF. Am I insane?

No, you definitely are NOT insane. Bukkake is really fucking hot, particularly when there are multiple (like more than 2) Alphas involved. You describe it perfectly. It's basically one of a true faggot's deepest desires. Here's a pretty good video of a grateful faggot receiving three cumshots on the face:

Why is this so hot for faggots? Part of the appeal comes from the humiliation of being used like a cumrag by multiple Men. Another appealing aspect is the feeling of multiple ropes of cum coating your face, which is not only humiliating but liberating.

And then I think an overlooked aspect of it comes from something you mentioned in your ask - the fact that these Alphas bonded over the experience of dumping loads on your face together. Watch that video above again. The Men are laughing with each other over the fact that they just drenched this silly faggot with their jizz. The faggot might as well not even be there. It's like the faggot really is an actual cumrag, rather than a human.

Being used this way is so powerful for both the faggot and the Men using it. It really highlights Hierarchical principles in stark relief.

Oh, and by the way: you say this Alpha is not your Owner, but I have news for you - he already is your Owner. He's claimed you through this hazing ritual with his Alpha buddies. I suggest that you start accepting your true role as this Alpha's faggot, and let go of the false "independent bisexual" narrative to which you've been clinging. Time to be honest.