That's funny! No I didn't know that. hahahahaha
Did you know that a 2x4 is actually 1-1/2" x 3-1/2"?
Originally they actually are 2x4, but they're a rough cut. They're run through a plane to give them their smooth sides, removing 1/2" from both sides making the 2x4's you see used in construction. You can actually buy a rough cut 2x4, but not many people do.