You'll excuse me if I skipped to the conclusion. It's a nice theory. Plenty of those. When it's tested and proven. post the results.
That's only a study dealing with prevalence. Prevalence doesn't tell me why it happens, just how often. And the first line 'homosexuality is a common occurrence" made me pause. Common by what measure? And the genetic link hasn't been proven yet.
So what happened. That link said less than nothing.
Once again starts with homosexuality and works backward. You can do that with any number of behaviors. Not quite gonna cut it for something that is innate like sexual orientation.


Here's a critical review. Not very flattering.
You gotta be kidding me.

When? I don't remember them. But even if they have, it wouldn't have mattered. None of that is anything but unproven theory, nothing presented as fact. You can find concise heterosexual physiology from hormones, to glands to organs in any physiology book. Presented as fact. Until then, to me, homosexuality is a socially viable but aberrant human sexual behavior deviation. Along the lines of the "other" deviations that society frowns upon.

I'm not gonna go through those until tomorrow. But I would think if any concrete information was out there to present, it wouldn't take this long in a thread to talk about it. Somehow I doubt that ANY of those links will present a fundamental biological cause, purpose and physiological link with the urge as heterosexuality has. For example I'll start with the first one.

She starts with homosexuality and works backward. Any dumbass can do that. Especially if you ignore the fact that we have an example of a sexual orientation that "works" and has a purpose. I bet if we look at the spurious sexual antics of dogs humping a guy's leg, and ignore that legs are for walking, you can come up with a justification for dogs humping legs. Especially if you also ignore physiology and just concentrate on the mental urge itself. Reproduction, respiration, digestion, and sensory needs all have a system designed for them. They are acutely evolved for the job they are to perform. Now you can bullshit yourself that humans born with aberrant urges that oppose anything that normal humans have evolved organs and systems for, and you can follow that Roughgarden crap too, unfortunately, I don't. I'd like my science to be able to justify itself from all directions. 360 degrees. Not just the ones that are convenient and easy.

I got 4 hours tomorrow to check out the rest.