C: I'm changing into my pajamas but u don't want anyone to see my nipples.
R: I don't have any nipples.
Me: Yes you do. You have two of them.
C: Everybody has nipples.
R: Oh are these my nipples?
Me: Yup.
R: Do you have nipples? Are these your nipples?
Me: Yup but you don't touch girls nipples.
C: That's because they're big nipples.
R: Yup
C: They're big milk feeding nipples.