Counting the gay and bi population in Vancouver is like herding cats.

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How many gay and bisexual men do you think there are in Metro Vancouver?

Think of a number. I’ll wait.

If you guessed 30,000, or three percent of Vancouver men, you’re probably not far off, according to a new study by a Vancouver researcher. But if you were way off the mark, don’t feel bad about it. It turns out counting gay and bisexual men isn’t easy, even for scientists.