Hi Igor, welcome to Male survivor. By the way my real name is Igor
Not sure to have simple answer on your question and I can talk only from my own perspective.
I'm feeling like straight person inside but at same time I'm attracted to men also and having many problems with watching such porn.
I heard first time here for term same sex attraction and what that implies and it was like I found explanation of some my traits. But at other side there are people that doubt about such concept and rather see it as some sort of covering own homosexuality and to be honest there is something in it.
So for me it is nothing black and white and I don't try to define myself at the moment. I know that I would love to find female partner but I can't deny or ignore attraction to men and relating confusion.
My own experience was not violent but rather sort of "play" with other boys that introduced me very early to sexuality.
I understand that I become hyper sexual and probably that is how are the things set up. However I have some traits of abused person as I have difficulties to say no to other people, I can't draw sometimes clear line toward others, I've been closed and completely isolated when it comes to sharing intimacy, my trust is very easily destroyed and than I'm very fragile and insecure, I could feel submissive sometimes, I have coping mechanism that could be seen as not healthy or destructive with excessive watching porn and masturbating and by so escaping reality.
Something of that is direct leftover of my exposure to sexuality in my childhood and some because I was very sensitive and introvert and have had complex relationship with my parents and felt sometimes like left aside, not seen and acknowledge by them. It still hurts me.
So there is no easy answer on your question. I'm not surprised that there are many people attracted to same sex, that is nothing new nor something unnatural, only thing is that we are maybe not honest with ourselves to admit it and probably scared of unknown (I'm talking from my own experience). What is concerning me is root of finding "unhealthy" coping mechanism trough some activities like risky sex, porn and masturbation addiction, excessive drinking, using drugs, betting and many other destructive behaviors.
As I can say source of such behavior is possible sexual abuse, but it could be neglect or verbally abusive environment in past, dysfunctional families and similar. That is the answer that I've found for now. So as long as someone is looking for such activities when felt down and in search for some sort of escaping from hurtful feelings and reality it could be connected to some of those "preconditions". That is the reason why we are like driven and captured by such actions without much space left to be free of it.
Here is very good article that explains more about it: http://www.malesurvivor.org/ArchivedPages/singer2.html
Keep searching for answers!
Igor aka Pero