Yo Steve, I think I've found an explanation for why you're such a nut. Here's a list of symptoms of lead poisoning. I think you've been breathing too many fumes.

Delay in development
Learning difficulties
Irritability
Hearing Loss
Constipation
Seizures
Increased blood pressure
Muscle and joint pain
Memory and concentration difficulties
Mood disorders
Reduced sperm count

Explains a lot...