• Turning Homosexuality On and Off

What if you could take a drug that would quickly alter your sexual orientation from straight to gay, or vice versa?To their surprise, neurobiologists have discovered that homosexuality can be turned on or off in fruit flies. They’d known that sexual orientation can be genetically programmed, but they didn’t realize it could also be altered by giving a drug that changes the way the flies’ sensory circuits react to pheromones.