For thousands of years human beings have been in search of an aphrodisiac - a substance that can increase sexual desire and performance.

Raw oysters, ground up rhinoceros horns and even green M&Ms, etc. have all been touted for their ability to heighten sexual interest with various degrees of success.

Modern medicine, of course, has finally delivered on the promise of increased sexual performance with PDE5 inhibitors such as Viagra.

However, these truly magical drugs aren't actually an aphrodisiac. They affect the body, not the mind, and this counters a lot of the expectations and beliefs people had about human sexuality.

Viagra doesn’t increase sexual interest, only a man’s ability to get and maintain an erection.  As a result Viagra won't be enough, for most people, to produce an erection. There needs to be some kind of sexual stimulation and/or interest to produce the desired result.

It's important to note, though, that there is a positive feedback loop here that shouldn't be ignored.

The confidence that comes with the ability to get hard can produce the desire, both in yourself and in a partner, for sex.