Yeah, in case you needed another study to convince you:
The findings, published in the August issue of the journal, Tobacco Control, show that as many as 37 percent of homosexual women and 33 percent of homosexual men smoke. That compares to national smoking rates of 18 percent for women and 24 percent for men in the 2006 National Health Interview Survey. [...]
"The underlying causes of these disparities are not fully explained by this review," Lee said. "Likely explanations include the success of tobacco industry's targeted marketing to gays and lesbians, as well as time spent in smoky social venues and stress from discrimination."
"Tobacco is likely the number one cause of death among gays and lesbians," Lee said, "but there is hope. Many gay and lesbian organizations are starting to reject addictive funding from the tobacco industry, and the community is organizing itself to address this health inequality through the National LGBT Tobacco Control Network."
That "time spent in smoky social venues" is probably a big one. The only times I've ever subjected myself to second-hand smoke have been in gay bars, usually because there's only one in town so there isn't much choice.
What do you think? Studies saying G and L people smoke more have been around for a while.... What's the cause?