Is it normal?

Char • ❤️❤️❤️

This is probably totally stupid.

Is it weird that my nephews 8 years old are so curious when baby girls diaper is being changed? They asked grandma why she didn’t have a penis lol. But one of them is super curious every time. It’s normal right? Or no? This is my overprotective mom side kicking in. 🤷🏻‍♀️