Because I've been through it. I've had the "I better find a girlfriend even though I don't want one" thoughts. I know so many gay people who've had completely different situations to realize that since there are such huge differences in upbringing, it can't be a "nurture" thing. Since everyone is raised differently yet there is still a fairly consistant percentage of homosexuals.
You've fallen down the slippery slope
You falsely assume that:
a. gays do not reproduce.
b. an entire generation of people would have to be born gay simultantiously for a check/balance to occur.
c. Only the best and strongest survive.
To address those:
a. gays do reproduce, usually having heterosexual children. I think it should be fairly obvious to you that gay people usually are born to heterosexual parents. My partner and I have every intention of having children some day.
b. the number of gay people has been fairly consistant. the number of openly gay people has increased though.
c. Jerry Springer show.
Not the first time I've heard these arguments and I'm sure it won't be the last. That doesn't make them less wrong.
You need to study genetics. Which is odd because I think you've mentioned that you are a scientist <forgive me not remembering the field>.
My parents both have brown hair and brown eyes. I have blond hair and blue eyes. Both of my grandmothers had blond hair and blue eyes. It's called recessive gene.
As far as re-population is concerned. Heterosexuals are certainly capable of over supply.
unlikely.... as you're still wrong.
There are members of this society, regardless of sexuality, that never reproduce, yet contribute greatly to the common good. There is much more to society and life then spraying your DNA across the land. There are those in this society whos job it is to pump out kids. There are those who's job it is to pump out ideas. There are those who grow the food. There are those that own the land <me>. There are those who care for the ones who pump out the kids, and grow the food, and think of ideas, and own the land. Think of a bee colony. If producing offspring were required of every single member of the colony, bees would only be seen in chunks of amber. In a bee colony, only one member ever reproduces yet the species lives on. All the other members that never reproduce still contribute to society. Indeed, the be colony couldn't go on without the non-reproducing members. Obviously, this is an extreme example and we humans have a more hybrid system.
We like to think of ourselves as "higher beings" over the rest of the animal kingdom. We share traits with many other species. New York City, the worlds largest bee colony.
Again, agree to disagree is a way out for someone who is wrong but doesn't want to accept it.
You're not going to insult me and you're not going to come up with any argument that I haven't already encountered.
To summarize:
A. Gays reproduce.
B. Gays are the product of heterosexual sex.
C. It is entirely possible, and indeed likely, that homosexuality is gentic.
D. Homosexuality being genetic does not mean the human race will end.
E. People can contribute to the good of society without reproducing.
F. Regarless of the cause of homosexuality, there is no reason to deny the legal protections of marriage to homosexual couples.
G. Allowing homosexual couples to marry will not cause more people to be gay.
H. Allowing homosexual couples to marry will not harm anyone.
I. Allowing homosexual couples to marry will reduce the potential for "high risk behavior"
J. As we've already learned, seperate but equal isn't equal.
K. Allowing homosexual couples to marry will not increase health insurance:
a. As if insurance companies needed an excuse to raise rates.
b. It would have happened already since most large companies offer partner benefits.
L. Allowing homosexual couples to marry will not lead to beastiality.
M. Agreeing to disagree is not a solution.