Professor Bob has entered the classroom, so everyone shut the Hell up.
@Yoshiiki and
@super_slicer, that includes you two!
So, men have an XX chromosome, while women have an XY chromosome. You have to assume that by association, having at least multiples of a single chromsome paired alongside each other is biologically homosexual. Therefore, two male chromosomes (XX/XX) and two female chromosomes (XY/XY) in close proximity in a sense that can be considered sexual is considered homosexual in nature. But, you must consider the following:
1) Men carry a double strand of the "X" chromosome.
2) Women carry a single strand of the "X" chromosome.
If you were to consider this: sleeping with a woman is functionally half-gay. You are still interacting in a sexual manner with what carries half an "X" chromosome, ergo you are sexing what is biologically half a man. So, what about futanari's, whom possess both features? One could argue that they are a mutated half-gender of both; so, you'll get a mutated strain of the XX/XY chromosome pairings, something along the lines of a triple XXY chromosome. Consider something for a moment.
1) Heterosexual relationships are half-gay
2) Homosexual relationships are full-gay
So, if a woman has both a penis and a vagina, it's feasible to assume that you are getting a 1/3 gayness on the "gaydar." How does one come to this conclusion? Simply, the existence of an additional "X" chromosome splits the pre-existing "XY" chromosome into two halves, and then shoves itself deep inside that chromosome for maximum effectiveness. However, rather than permit the body time to adjust during incubation, it pounds itself into place and asserts itself before objections can be stated. When this happens, the chromosomes are forcibly split, and attempt to adjust the body to the new, unexpected chromosome. Unfortunately, in their rush to tell all the other chromosomes this, they get confused and the message stops being "we're weird, ignore us" and instead becomes "look at us! Be like us~! It feels so good~!"
So, with the invasive "X" chromosome telling the "XY" chromosomes to add a dick and not to skip the vagina and tits, it's asserting that the best of both worlds can be achieved. It's removing the gay while adding some gay. You get half an "X" chromosome, half a "Y" chromosome, and a full "X" chromosome; ergo, one-third gay.
Being attracted to futanari's is actually less gay than being exclusively attracted to the opposite sex by reasoning of biology. To oppose this logic is to be in denial about one's own sexuality, and to reject the common sense of the masses. You attain the best of both worlds with futanari, whereas with regular, heterosexual content, you are still embracing half of your own gender. Either way you look at it, futanari is the least-gay choice.