Is chocolate really evil?

A couple days ago I had some Hershey's bar and last night our little monkey was fussy, fussy, fussy... not fussy during the day... but he waited until it was time for us to all be asleep.  So up we were multiple times in the night, which reminded us of the first weeks at home with Alex.  Does this mean that I should avoid chocolate?  Or does this mean that Alex is not a fan of the Hershey bar (sorry, Erin)...  Good news is, there's still chocolate in the cupboard for when you come to visit next!