Anatomy lesson

Several weeks ago we went to the zoo with some friends of ours. They have a little boy that is just around Keaton's age. We were walking through the zoo enjoying the animals, when Jarrek noticed that the little boy was 'adjusting' himself. Jarrek asked "Do you need to use the restroom?" His reply: "No, my penis itches". Well, Tatum and Keaton just thought that was hilarious. We very quickly had a talk about that word: it is not a bad word, it's the doctor word for a weewee (that's what we call it). Keaton and Tatum found numerous times to use the word penis. Every time we had a talk about how it was not appropriate to use that word the way they were using it. Finally, they got the idea of when it was OK to say and when it was not. Well, apparently I didn't explain it too well...a few days ago the kids were playing with some wooden poles and Tatum grabbed her 'area' and started groaning. I asked her what was wrong and she said "I hurt my penis". I tried so hard not to laugh out loud and had ANOTHER talk about that word and made it very clear that only boys have those. Tatum just said "OHHH".