I have a friend who is not a parent. He has a niece who lived with him and his parents while she was a baby, and because of that he thinks he is a parent. He will say things like, "with mine, I did this...." With your what? He has tried to tell me about breastfeeding, how to dress LO, etc. So naturally we just stay away from him now. It's just easier than getting together and getting all pissed off.

On a side note, he has said that I've become pretty arguementative since becoming a mom. But I don't argue with anyone else, just him!