Scientists have been able to take control of flies' brains to make females behave just like males.
Researchers genetically modified the insects so that a group of brain cells that control sexual behaviour could be "switched on" by a pulse of light.
The team was able to get female fruit flies to produce a courtship song - behaviour usually only seen in males.
The study, published in the journal Cell, suggests that the wiring in male and female flies' brains is similar.
Gero Miesenboeck, from Oxford University, UK, who carried out the research with J. Dylan Clyne from Yale University, US, said: "It is often the case that males have to work very hard to convince females to mate with them."
I will vote this cold myself as i already knew from many years of experience that "males have to work very hard to convince females to mate with them."
Although if i spent all day tormenting fruit flies I too would have to work doubly hard to attract a female.