Homosexuality

As for having a mental disorder, please don't get offended, I mean it in a much less offensive way: an illogical part of our thought patterns. For example, after sucking at swimming as a kid and having some not-so-awesome tubing experiences, I never feel very safe when swimming anywhere where I can't touch the bottom and generally avoid swimming. One of my friends at school got sick to his stomach the first time he had a hamburger at a fast food restaurant, and now he only gets chicken burgers for fast food. Both of these fit my definition of mental disorder: no amount of swimming practice is going to make me feel safe swimming across a small lake, even though I would be much safer than I feel. And despite the fact that fast food chicken burgers, regular burgers, and fast food burgers are all prepared in similar ways, my friend isn't going to eat a fast food burger.

I'm quite sure those are not a mental disorder by your definition, mister. It's completely logical to be afraid of something one has a bad experience from. That's nature's own system to prevent the individual from dying or being sick and thus die (because in nature, sick and young gets eaten first). And it's certainly able to overcome. I myself drank pure alcohol combined with soda the first time I got wasted, and had a "sodaphobia" for 3 months due to experiences. Then it faded away completely in 2 more months.

And if you're going to say that homosexuality is a mental disorder by your definition, as an illogical part of our thought patterns, then it may mean one of the following things:
- A mutation in your body occurred (most likely in your brain), making you gay
- The egg + sperm did not melt together the "right way", more or less the same as above mentioned

Or, if we're saying that your definition is okay, then there has to be some trigger in order to make a person gay, and I would suspect that most gays would feel offended if you're saying something like this.