@rojo Because, Viagra doesn’t increase sex drive in men. It increases blood flow to the penis. Sometimes, a man can be quite aroused, but only get a partial or short-lasting erection; Viagra helps make it so that mens’ erections are longer and harder. With women (and yes, women can take Viagra, the same pill, with roughly the same effects), it increases blood flow to the clitoris – but women don’t need a swollen clitoris the way men need an erect penis in order for penetration to happen. If women (and men) want to increase sex drive, not blood flow, they get aroused with things like pornography, erotica, a raunchy scene from a beloved movie, having a nice dinner with their partner, romance, etc (and romance and pornography? Pretty booming industries, so don’t tell me there’s not a market for that stuff). And trust me, women are totally having that discussion.