Because they're bad conductors.
A pervert.
The teacher tells you to spit you gum out. The train says, "Chew, chew, chew!"
A screwdriver
Driver: My brakes don't work so I was rushing home before I had an accident.
He was too good a conductor
he was a bad conductor.
I am not funny and I need to be. I am writing a script for a short show that's formatted like "Weekend Update" on Saturday Night Live. So that means one sentence about the topic, and then one liner joke. Thank you all!
Parole.