Because they never get a reaction.
Because of the Endor-fans.
Because some people appear bright until you hear them speak.
As told by my 9 yr old) Spiders.
Because if it did, we'd have sent foreign aid by now.
Chemistry, because there is lots of acid involved.
Because you can put it in someones drink
Their jobs get a lot easier when there are no reactions
They never got a reaction out of him.