A friend think his homosexuality was caused by his molestation as a child. More inside.

A friend found out last night that, as a small child, he was molested. He was too young at the time to have any memory of the abuse. He found this out from his brother who's about two years older than he is.He told me that he feels like that's the cause of his homosexuality (he's now in a hetero relationship). I know many people don't feel there's a link between molestation and homosexuality as an adult, and I agree. Especially if he had no knowledge of the events until last night.He did say that now that he knows, he feels like he had his life back because it explains a lot. He's been through a lot of denial about his sexuality and what caused it.Thoughts?