פירוש על עבודה זרה 72:2

This is the tradition we learned yesterday.

The rabbis prohibited having sexual relations with a non-Jew, declaring them to have the status of menstruants, with whom a man cannot have sex, from the time they are born. I should note that this text is addressed only to men. The prohibition of engaging in sex with a Gentile is directed at men—to them women are prohibited. I doubt the Talmud means to imply that Jewish women can have sex with non-Jewish men. It is just that the Talmud was a text composed by men, mostly for men.