According to Wikipedia, 

In Jewish folklore, Lilith was Adam‘s first wife, who was created at the same time (Rosh Hashanah) and from the same earth as Adam. This contrasts with Eve, who was created from one of Adam’s ribs. The legend was greatly developed during the Middle Ages.  According to the 13th century writings of Rabbi Isaac ben Jacob ha-Cohen, Lilith left Adam after she refused to become subservient to him and then would not return to the Garden of Eden after she coupled with the archangel Samael.[4]

Apparently Lilith was the first feminist, and was cast out of the garden because of her feminism.  So, when Eve was created later, and then sinned, do you think this is why Adam decided to sin with her and partake of the fruit?  After all, he had already lost his first wife.  What do you make of this story?  Does this make Adam a polygamist too?  Is this another story to embolden patriarchy?