I would have another thing for you to think about. Is it possible we have a higher percentage of gay people now than we did 50 years ago?
A number of studies have shown that gay men are more likely to be left-handed. However, as a side note, among those gay men who are right-handed, they are much more likely to have older brothers who are right-handed, strangely enough.
http://www.sciencedaily.com/releases/2007/11/071130165501.htm
Oh please quit trying to convince people that you unserstand anything about science.