Do you teach your children the proper names for their's? I've been talking to DS (3) about the other name for his "peepee". He's now in the bath yelling "penis...PENIS...PEENIS...PEEENNNIISSS!" I think this may have backfired a little lol
Something I heard years ago that has always stuck with me is that if you can't teach your children the proper names you are ashamed of those parts of your body and you are teaching your children to be.
Definitely teach children the proper names for their parts. Do we make up cute names for knees or noses? No, so why do that for penises or vaginas. I nannied a girl once who kept telling me her she-she hurt, she was two. It took me a while to figure out what she meant, so I asked "your vagina hurts?" When I spoke to her mom about it later I almost got fired for saying vagina. I did not last with that family long though, we had very different ideas.
I'd rather my child know proper names for body parts, even the private the parts. My one cousin use to refer to his penis as his "apples", and while I found it funny (i was a teenager then), looking back it's tacky.
It also saves embarassement later. By using nicknames for private parts we're creating a taboo for our children to to talk about them. And if you're having a problem you need to be able to tell you parent or your doctor exactly what is going on.
When I was in the 7th grade our health teacher made us going around the room and say penis, vagina, and breasts, until we could say it without laughing. It wasn't a joke and it was going to be hard to talk about reproduction and safe sex if we couldn't even talk about the parts properly.
Teach them right when they're young and they won't need to be retaught when they're older.