Homosexuality

Your reasoning is flawed to the point where it's unworkable. The world is not governed just by mathematics, it's governed by a lot of disciplines, including biology, chemistry and physics. However, much more significantly than that, the world is governed by the actions of LIVING BEINGS, both human and non-human. Are you truly going to say that the actions of a rabid dog that mauled a child are "rational?" As for human beings, there is giant documentation spanning nearly all disciplines that documents the irrational and illogical workings of the human mind. There are many times when we do things without reason, and even if the illogical reasoning behind such actions is held to be "reasoning," (it often does not qualify as reasoning of any kind,) it still wouldn't be rational.

If we were truly rational, we wouldn't be a "human race," we'd be an "ant colony."

"Rational: endowed with the faculty of reason."
"Reason: a basis or cause, as for some belief, action, fact, event, etc."

Actually yes the actions of the rabid dog are rational for there is a reason as to why it did what it did. The chemical reactions inside of the dog's brain caused it to maul the child, thus there is reason behind the mauling, therefore it is rational. Although it might not be right it is still rational.

I shall say it again, although we might not comprehend why something happened does not make it void of reason. Everything has a reason for occurring for if it didn't, it would not have occurred.