Off topic: A Daddy's Dilemma

My friend Chris finds himself in a potentially precarious position and is needing some help. Here's the gist of the situation:

We have a boy on the way, due December 19. It dawned us during the lunchtime conversation that none of us have had to deal with the naming of the boy part yet, due in large part to my uncanny “shielding” ability. Here’s the deal though: With this boy on the way and a curious big sister sure to be lurking over every diaper change, we are going to face the question of “What is that?” sooner rather then later. How are we to answer? Do we teach her the proper scientific term now? Do we assign a nickname like “Winky” or “Doodle” or “Wee-Wee?”

Any of you moms or dads have a little help for him? If so, leave a comment on his blog.