Dams & Their Makers

Last night Cheeks was reading a book about The Transformers. 
One of the sentences ended in "Hoover Dam".

He thought it was a bad word.

I explained to him what a dam was & who built them.

Me: "Some are man made, which means men make them but others are built by beavers"

Cheeks: "Justin Bieber builds dams...YAY"

Sigh.