Nope, human sexual preference is base on the chemical that people have in their body during their development period, which can be both factors of biological(genetic) or could be enviromental influences. And base on what I learned in class, children doesn't have a sexual preference until they're adolescence.
from a biological perspective: genetic play a key role in controlling the level of estrogen, androgen and others sexual development hormone which during development period shape the brain, the body and the chemical within the body.
enviromental: chemical ingestion can also act to influence a child, though it might be quite minor but over time it can build up. For example let say you're eating a burger dose with estrogen for everyday until you're 15, chances are you will have a higher than normal estrogen level inside your body and in some way make you more feminine, same can be apply if you're taking androgen.
And base on what I learned in class, children doesn't have a sexual preference until they're adolescence, so both factor might play a role in shaping a child sexual preference. But don't take my word for it, since it is base on animal research, not human...
