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"Unexpectedly, we did not find the signs of genomic decay as predicted."The fish reproduces using a strategy in which a female's egg cell develops into a baby without being fertilized by a male's sperm cell.

But that does not mean the fish does not need some hanky panky.

Recent research indicates that there are more physical (or biological) causes for "sexual dysfunction than were recognised before." Certain medical conditions such as diabetes, cardiovascular disease, multiple sclerosis and "certain prescription drugs may be linked with dysfunction." A difference in sexual desire is one of the most common problems couples face and can cause much unhappiness and frustration if it is not talked about.

Tiredness, depression, illness, stress, anxiety, relationship disharmony, drug or alcohol abuse can affect energy levels and sexual desire.

The asexual mode of reproduction termed gynogenesis requires the female to mate with a male but none of the male's genome is passed to the offspring," said geneticist Wesley Warren of the Mc Donnell Genome Institute at Washington University in St. The Amazon molly's egg cells are activated to develop into an embryo by a sperm cell that degenerates without fusing with the egg's nucleus.Sex therapy can be an effective treatment, rekindling the sexual spark and encouraging the couple to talk through problems and learn new techniques in lovemaking.Loss of sexual desire can be confused with a low sex drive. hormone changes, thyroid disorders or changes in brain chemistry, may all play a part in female drive disorder.Animals that reproduce asexually are rare compared to the overwhelming majority that exist as males and females and reproduce sexually."It was long thought that vertebrates would not be able to exist in such a way.It was a sensation when the Amazon molly was the first asexual vertebrate discovered in 1932," Schartl said.

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