The study was expanded to include homosexual women the results were consistent with previous findings meaning that homosexual women were not as responsive to male identified odors, while their response to female cues was similar to that of heterosexual males. Using a brain imaging technique, Swedish researchers have shown that when homosexual and heterosexual males are presented with two odors that may be involved in sexual arousal their brains tend to respond differently, and that the homosexual men tend to respond in the same way as heterosexual women, though it could not be determined whether this was cause or effect. ĭespite these claims, no pheromonal substance has ever been demonstrated to directly influence human behavior in a peer reviewed study. Subsequently, androstenone, axillary sweat, and 'vomodors' have been claimed to act as human pheromones. In the 1970s, 'copulins' were patented as products which release human pheromones, based on research on rhesus monkeys. Some body spray advertisers claim that their products contain human sexual pheromones which act as an aphrodisiac. No well-controlled scientific studies have ever been published suggesting the possibility of pheromones causing rapid behavioral changes in humans.
