I don't have a penis, but I get to wear make-up
Sometimes I don't know how to answer Charlie's toddler questions, so this is how our conversations can go. The other day he saw me putting on my make-up.
Charlie: "Mommy, can I have some?"
Me: "No. Only girls wear make-up."
Him: "Charlie a boy, And Josh and Matt and Mike boys? And mommy girl?"
Me: "Yes, that's right."
Him: "Mommy, can I have some of that?"
Me: "No, only girls wear this too. Boys don't wear make-up, but they do have penises."
Him: "Oh. I have a penis, and mommy, you don't have one."

Later he was checking himself out, and he said, "Mommy, what's this?"
Me: "Um, your testicles."
Charlie: "What they for?"
Me: "For making babies later on."
Charlie: "Oh. Babies like me!"