Female gets attracted to male !!!!!

When female mice detects dominant male's urine, new brain cells are produced in female mice. Urine is rich in the sex pheromones that many animals use to recognize and choose their mates. But how they work is unclear. So Samuel Weiss from the University of Calgary in Alberta, Canada, and his colleagues looked at their effects on the brain.

The results, published in Nature Neuroscience, suggest that pheromones from dominant males stimulate the female brain to make new neurons. Weiss thinks that the pheromones bind to specialized receptor proteins, which then signal to another brain region called the hypothalamus, triggering the release of hormones that cause the birth of new neurons.

We don't know whether pheromones trigger neuron formation in humans, although we do have receptors similar to those found in mice. It's possible that some types of human sexual behaviour could be affected by pheromones, says Zhengui Xia from the University of Washington in Seattle, who studies neuron production. But whether a subconscious whiff of an alpha-male's urine could turn a woman's head is still a matter of speculation. "Olfaction is a subtle and underappreciated sense," says Weiss. "Maybe we've underestimated its importance."