In various shapes and forms, the following has been making the rounds:


This has a ring of truth to it, which is why people think it's funny. But it's false - unless the woman in question is failing to protect her fertility by getting tested and using condoms, or is failing to use birth control.

I think that the label "slut" for women who like sex is spread primarily by women who have a lower sex drive to begin with, and use sex as a means of manipulating their partners. If such women did not shun and discredit other women who genuinely like sex, then their undesirability would become apparent and their manipulativeness would lose power.