Narada Smriti 12.78 Intercourse is permitted with a wanton woman, who belongs to another than the Brahman caste, or a prostitute, or a female slave, or a female not restrained by her master (nishkâsinî), if these women belong to a lower caste than oneself; but with a woman of superior caste, intercourse is prohibited.
Why are men allowed to have sex outside the institution of marriage but women are not?
Nithin Sridhar, an Indic scholar, in his blog on the Hindu view of adultery writes:
The definition of adultery was confined to:
1) Men—either married or unmarried– having sexual relationship with married women
2) Married women having sexual relationship outside of marriage.
Is this not misogynistic?