Genius
You know how kids are about putting random stuff into their mouths, right? If you don’t, then you should know that anything and everything looks like food to them (except food). And they probably expect that, like them, you would also place any object you find in your mouth.
Luckily, this kid was only going to feed a piece of broccoli to their parent. When the OP bit down on the broccoli, they wondered why it was so hard. Was it undercooked? Nope. They actually took a bite of the poor kid’s finger. Watch what you do, guys, especially when you’re around your kids.