A recent post at Feministing illustrates the point I was trying to make about tolerance that sometimes turns into a parody of itself.
The post responds to a message from somebody who feels asexual and finds anybody's touch "absolutely repulsive. The thought of sex makes me gag a bit." The response that the author of the message gets to her post takes the idea of political correctnes to the extreme that is even a little scary. The main idea of the response is "Asexual people of the world, unite!" Don't worry about beinng asexual, it says. You can always get together with other asexual people, date them, and form yet another neat identity group.
This attitude does not come exclusively out of the desire to show the world how tolerant and accepting one is. It is also the result of a deeply Puritanical view of sex, which refuses to see human sexuality on terms of a physiological process. If anybody found the idea of eating or sleeping (also physiological processes) "absolutely repulsive", we wouldn't be as likely to dismiss this problem with a lot of well-meaning but ultimately empty words. Nobody would (at least for now, I think) suggest to form an identity group around this problem.
Another problem that the response to this post brings to light, is the deep-seated fear that many Americans feel towards psychology as a field of knowledge. While several people suggested that the author of the post look for hormonal causes of her asexuality, nobody mentioned that it might be helpful for her to search for psychological causes.