Women don't want to be friends with girls who sleep around (but men don't care if their mates do) - and EVOLUTION is to blame

The Daily Mail reports:

Women who have many sexual partners are disliked by other women - but men who are sexually voracious are less likely to be judged by their peers. A study found that promiscuous females – defined those who had slept with 20 people by their early 20s – were more likely to be rejected as a friend by another woman. Experts are not sure exactly why this is, but they believe the behaviour has evolved as an attempt to keep relationships safe.