Actually leaving a baby alone will make him die.
But if he survives, you know that thing called imagination? The baby will learn to imagine what he needs. He will use (as said before me) curiosity to look for more things.
How you think people come up with ideas? By choice? People choose to think up some new idea? They may think of trying... But can they say "Today I'll create the idea of nuclear bombs" or does it come to them out of nowhere? (Maybe that one was a bad example but hopefully you get me).
As long as I remember myself I was gay. I liked girls at times, but never was attracted to them. Never. I also answer to everyone who say why won't you try and choose girls, try to choose boys!
It was not a choice, and if it was some uncontentious choice it doesn't change the fact that I am gay.
Btw saying being Gay make someone useless does not know animals. There many herd animals that are born and never reproduce. Wolves, Ants, Lions. Some of those will never get to mate with a female (or in the ants case, a male) and yet they exist. Can you say their useless? That extra wolf that will never mate brings meat to it's family, helping at least half of it's genes spread. The ants? They evolved to be workers. If they will have children they will be less genetically close to them then to their sisters, so helping the queen reproduce actually makes them spread their genes. Even so did you know bees sometimes try to kill all the males the queen brought up because their genetically not as close as a sister would be? And those are the useless bees that can't reproduce, doing something to make sure their genes do spread.
In humanity if there was no gene that makes males allow other males to be around without warring constantly for the females than we wouldn't have a society that males can be next to each other. Maybe when that gene is increased, or mixed with several other genes creates this effect into a too strong effect, and makes males completely be attracted to other males, and not only just allow other males to be around. Same exact rules go for females.
And to all those who wants to know how many gays there really are in the world. once no one will hate them, you will know. For know it's said 8% of the population is gay. I'll go with that.