LOL. So you think a kid seeing some rainbows and gay couples could “persuade” them to be gay? Seriously, that is not how it works anymore than seeing straight couples “persuaded” or “influenced” someone to be straight. I did not need straight couples to suddenly realize I was attracted to girls in 5th-6th grade. I believe it even more now, the fact you truly think it works that way tells everyone here you likely have been working hard at repressing some feelings you have.
I dont think things are as clear cut as you make them seem. The ideal body shape changes every 10 years or so. Does this mean something changes genetically in our brains every 10 years? Of coarse not.
We are easily influenced by our surroundings. When all the magazines in the 90s showed stick thin models, then the majority of young guys were attracted to this ideal. When big bushes were cool in the 70s playboys, men were attracted to that. In the 90s and 2000s it was all about being clean shaved, and then young men were attracted to that.
Obviously there is nothing wrong with the clean shave look or a hairy vagina, but it shows that when you are exposed to a certain thing, it shapes what you think is attractive.
In southeast asia they think pale skin, chubbier girls are more attractive. I the us we think skinny tan girls are attractive. Is there something inherently different between our brains? Or do you think its possible that we are influenced by our environment and all that goes with that?