Embarrassing or Not....

So we had friends over tonight for dinner and to watch LOST. During dinner, Reilly picked up his shirt and pointed to his nipple, I asked him what he was doing.

What is this called? (pointing to his nipple)
"Nipples"
Mine are Little... you have big ones of these.
pause and giggle at the table
I have another one, where is it?
"It's on the other side"
Pick up your shirt Mom, let me see yours.
"No Reilly..."

I suppose that is where the expression "Out of the Mouths of Babes" comes from.