Quite right! And homosexuality is part of the design.
Sez you. And I disagree. Nothing more to be said really.
I love the Ostrich approach to debate. Comfortable with your head in the sand? I always figured it would chafe the ear canals. I digress...
Latest evidence shows that sexual orientation and sexual identity are two entirely different phenomena Sexual identity we know is at least partially controlled by hormone dosage in the womb. Despite the fetal DNA, exposure to a high androgen:estrogen ratio results in a brain that is physiologically male; a high estrogen:androgen ratio results in a brain that is physiologically female - and all this is independent of your chromosome configuration (though is probably still genetically controlled and a result of translocation/recombination in particular cell lineages or endocrine wiring gone awry). Your primary and secondary sexual characteristics (penis, vagina, breasts, hair, Adam's apple, hip shape, ovaries, testicles, etc) are controlled by a very specific set of genes on the X and Y chromosomes that interact to produce a male - the default is female, and occurs when either a Y chromosome isn't present or the gene that sets the cascade in motion from the Y chromosome is non-functional (which results in Turner Syndrome, usually).
Sexual orientation is an entirely different kettle of fish. While there has been a great deal of speculation that it is genetically controlled, it looks very much like its an interaction at multiple loci that produces some of the effects... but we're never going to find the "gay gene." Ain't. Happening. Sexual attraction is a complex beast that appears to be a combination of at least partially heritable genetic traits, neurochemistry, neurophysiology, and psychology. It's fairly commonly accepted in abnormal psychology that no two people have exactly the same set of sexual attraction cues - some people have cues that go awry, which generates fetishes (largely learned in early childhood development, near as we can tell). However, that doesn't exactly apply to gender, considering there are basically five types of gendered attraction:
1. Attraction to women.
2. Attraction to men.
3. Attraction to women and men.
4. No sexual attraction (asexual).
5. Attraction to the majority of individuals identifying as one gender but some individuals identifying as another.
And none of those correlate strongly to sexual identity (meaning whether one thinks they are male/female/other) or primary sexual characteristics (whether one has penis and testicles or vagina and ovaries), or even genetic sexual identity (whether one has a an X:Y ratio of 1:1, 2:0, or something else).
Given that nowhere in all this does anyone have any meaningful choice in the matter, homosexuality and transgendered identity can be considered nothing BUT natural.