Can Sexual Abuse During Your Childhood Years Make You Gay?

I just read an interesting article in the Orange County Register about a man who was sexually abused while he was younger living in a group youth home. As an adult he married and had children, but as the paper states: 'The sexual abuse left Jones with demons. The husband and father of three said he struggled with his sexual identity and cocaine abuse and completed three stints in mental institutions before he started turing his life around in 1997. ' Jones is now on a long-distance adventure to stand-up paddle from Oregon to Mexico to highlight sexual abuse of children.
So, again the age old question rears its head...nature vs. nurture?
I am tending to think it can be biological only, but in many instances feel it is a combination of both, a predisposition and something traumatic happening in childhood.
There seems to be some homosexuals that are apparent immediately and are very feminine while there are homosexuals that appear very masculine.
There are also heterosexual men who sometimes have a very soft feminine side to them....are they the ones born with a predisposition towards homosexuality but because nothing ever happened to push them to that, they are heterosexual as adults?
Who knows? I do know that I am going to have a lot of questions for God when I die....