We've ventured into a whole new realm of possible conversation now that there's another girl in the house - and one that occasionally appears nekkid to boot (in the baby bath or while getting a diaper and clothing change).
Ian: Mommy - Do girl parts tickle like boy parts?
(No comment from me after that - that's WAAAY too much information for my ears. He's almost six and I can't think of ANYTHING that's appropriate at that point.)
And so it all begins.