They're obsessed with rigid bodies!
They both need a *break* every once in a *while*. edit: this is a three-way pun btw - it works better out loud
Because they knead the dough.
The engineer replies " I make chips" "Oh yummy!"
Because they're poor conductors! (I know they're called Engineers but cut me some slack, I thought of this in the 9th grade.)
An algae bra.
