not read the research which found that in brain scans gay men had brain shapes similar to straight women and gay women had brain shapes similar to to straight men then?
Or the old pheromone research.
If it is not a choice then it is some physical and chemical difference and due to it's detrimental nature (from a survival etc point of view) it would probbably be classed as an illness.
getting offended over arguably accurate medical terms however does seem to fit in well with this new generation.
Whether it's nature or nurture that makes some people gay is besides the point, it's nothing like an illness! I doubt you can catch gay from someone...
Also the preference for same sex relations has nothing to with the desire to procreate, just because two men/women prefer to sleep together doesn't mean they don't desire to have children.