Sexual Orientation at a Young Age?

Alright, so I would just like to state first that I'm on an alt.I noticed a thread earlier discussing nature vs. nurture. One of the points was that we're not exactly assigned sexual orientation at birth but more-so grow into it through our genes. I learned in my sexual orientation class that children are fully aware of their sexual orientation by the age of three, which was exactly the case for me. I knew I liked guys at that time. I attended a private school that started children off at the age of two. So by the age of three I already had some knowledge of what was going on around me. I was attracted to one specific boy but I was attracted to all "men." I would fantasize about oral sex with men at that young age and I knew it was wrong, but I couldn't help thinking about it or my arousal from thinking of it.Has anyone else had a similar experience/ heard of similar scenario from someone at such a young age?