"MOM! I have a peenus."
"You mean a weenie?"
"No, mom. I have a PEE-nus. Billy* has a peenus, too."
"WHO TAUGHT YOU THAT?"
"Dolly*."
"Oh. Hmm..."
"Lisa* has a VAGINA."
"WHAT??"
"Yea, Lisa has a vagina. Faye* has a boo boo on her vagina."
<too soon>
* All names have been changed to protect the innocent. And the totally guilty teacher who ruined my awesome track record with WEENIE.