I am trying to teach my son to be proud of being a male. When the kids were smaller, I told him that his sisters were jealous because they did not have a “winkie”
Yuck. What is with all this "jealousy" crap? And I don't think you are teaching your son to be a "proud male" there, more likely you are teaching him that women are inferior because they lack the "winkie". That's Freud 101 Cobra. Very sexist indeed.
