Ezekiel 23:18-21

When she flaunted her promiscuity and exposed her nakedness, I turned away from her in disgust just as I turned away from her sister.  Yet she multiplied her acts of promiscuity, remembering the days of her youth when she acted like a prostitute in the land of Egypt and lusted after their lovers, whose sexual members  were like those of donkeys and whose emission was like that of stallions. So you revisited the depravity of your youth, when the Egyptians caressed your nipples to enjoy your youthful breasts.