Scientists claim to have discovered a sex injection that could be better than Viagra.
They say a technique which boosts the sex drive of animals could also work with humans.
It also has the side-effect of encouraging weight loss.
The British scientists are now working on making it into a "wonder pill" instead of an injection.
Animals which were injected with a hormone that releases Type 2 gondaotropin, which drives the reproductive system in animals and humans, became mroe frisky.
Female musk shrews and marmoset monkeys injected with doses of the hormone began sending mating signals to their male partners.
The musk shrews presented their rumps and wagged their tails, while the monkeys flicked their tongues and moved their eyebrows.
The scientists also discovered the animals experienced a reduced appetite - by as much as a third.
At first, the scientists were only able to inject the drug into the brain of animals, but in a breakthrough they are not able to inject the drug directly into the bloodstream.
Lead scientist, Professor Robert Millar, director of the Human Reproductive Sciences Unit at the Medical Research Council, said the drug could cut out the need for Viagra completely.
He told the Daily Mail: "This drug would cut out the need for Viagra completely - Viagra does not produce desire, it simply leads to an erection but not to the desire for sex.
"This drug would arouse and produce the desire for sex at the same time, in both men and women."
Millions of people in Britain experience a loss of sex drive at some time during their lives.
Up to one in three women and one in six men are said to suffer from a loss of libido.