Today's Monday pun came from this guy.
A fellow who was having trouble with his teeth visited the dentist to
see what the problem was. The dentist found that two teeth were in very
bad shape and both needed crowns.
This seemed to solve the problem but after only a couple of weeks, one
of the teeth was giving the patient trouble again. So he went back to
the dentist. An examination showed that one of the two crowns was in
perfect shape but the other had eroded significantly and was causing
the problem.
Or, as the dentist explained, uneasy lies the crown that wears ahead.