Boy scout: Sir, I found a snake, is it poisonous?

Me: No little one, this snake isn't poisonous at all.

Then the snake bites the boy and he immediately starts to spasm and foam at the mouth, leaving the other kids watching, horrified.

Me: However, this snake is venomous. Venom is always injected, poison is ingested or absorbed through the skin. Let's get it right next time lads.