evidence: New analysis of old data suggests that "poppers" -- chemical inhalant stimulants used by some homosexuals -- may trigger Kaposi's sarcoma, a kind of cancer commonly associated with AIDS. [...] The only significant difference discovered was that those who developed Kaposi's sarcoma used the most poppers, or amyl nitrite, as a sexual stimulant. "Kaposi's sarcoma is a cancer of blood vessels, and nitrites cause the blood vessels to dilate, so you have the product having an effect in roughly the same place you're getting the cancer," he explains.