I just had a homosexual arguing in an emergent Christian blog for same sex marriage tell me both:
First, homosexuality has now been considered a normal, non-deviant form of human sexual orientation for over 35 years by the American medical profession, longer, far longer in Europe
Third, sexuality is both immutable and the ratio of gay to straight is somewhere between 3 - 10%, depending on who is making up the numbers. If that 3-10% of us who don't reproduce are really that big a survival threat, then I suggest it is only because you haven't been doing your duty and making babies.
Now last time I checked, anything that was practiced outside of the 1st sigma of any given population in statistics was considered "abnormal", while anything inside first sigma was considered "normal". Does anybody believe, even the most radical numbers, that something that is only done by 10% of the population is not outside 1st sigma? And thus, wouldn't it be an ABnormal, deviant form of human sexual orientation? Why is it my autism (1:150 children are autistic) is considered deviant and abnormal when gays are normal?