[Spivak]

I mean you can tell you kid 100 times not to touch the stove but they don't lean the lesson until they actually try once when you're not looking.

[HeWhoLurksLate]

...or they notice that the thing is red and radiates heat and decide not to touch it because it looks scary

[flak]

That's usually not enough when they're really wrong and it's their first time touching a hot stove /pot.