This doesn't even mean anything.
You can't make massive jumps to go from the study of linguistic distribution to one culture's views on sexuality. Otherwise, you'd have to start addressing the remote tribes in Papua New Guinea.
Simplicity has nothing to do with it. Thats a subjective argument that you're passing off as objective. Its dishonest and don't do it again.
There is more that had to do with the evolution of humanity than merely where it came from. Everything from geography, to weather, available crops, and available resources. Read Guns Germs and Steel or something.
Just stop trying to make it sound like the second largest continent has some inherently "non gay" instinct to it.
I'd much rather you just say that gay people make you think of icky thoughts and kill your boner rather than trying to come up with pseudointellectual bullshyt arguments and misrepresenting anthropological arguments you don't even understand.
You're an absolute cornball.