Twins

Lately, CHF is very interested in twins.  There are three sets of twins at his school (2 identical and one fraternal) and they've all moved up to classes closer to his so he sees them more.  He has been asking all sorts of questions about what twins are, how are they made, does he have a twin, etc.  Twin babies are particularly interesting.

Last night he asked me "Can you make me a baby again in your belly and ASF too and grow us again in your belly at the same time so that we can be twins?"

Me: Uh, no.
CHF:  Why?
Me:  Well, you grow older not younger.
CHF:  Can you make me some twins?  Nick has two twin babies.
Me:  NO!