Muppets from
Sesame Street skits aired around 1977-81. They were
construction workers, and Sully was mute.
Biff would
share his lunch with Sully, or
vice-versa (as this
memory is
fuzzy and I can't remember), but they were
friends and
demonstrated
co-operation and
sharing to us wide-eyed viewers of
PBS.
They were dropped, perhaps because of the
fact that there was already one
deaf person on the show, Linda or because
Bert and Ernie carried stronger traits of
dominance and submission and were even
rumoured to be
gay, and were much more
popular. They could have been exhausted for ideas with them as well.
What Happens to Dead Muppets?