It seems natural enough to look for categories – or at least that is what I teach in social psych – but it does lead to the biases I also teach about.

As the proportion of folks who are open and out increases, my guess is that gaydar will become an antiquated concept. Stereotypes may never die out entirely, but a few new ones will gain favor for a while and contradictory stereotypes (like butch vs. lipstick lesbians, limp-wristed vs gym-bunny gay men) will muddy the waters.