"Vow of Silence" joke

At a monastery high in the mountains, the monks have a rigid vow
of silence. Only at Christmas, and only by one monk, and only
with one sentence, is the vow allowed to be broken.
One Christmas, Brother Thomas is allowed to speak and he says, "I
like the mashed potatoes we have with the Christmas turkey!" and
he sits down. Silence ensues for 365 days.
The next Christmas, Brother Michael gets his turn, and he says "I
think the mashed potatoes are lumpy and I hate them!"
Once again, silence for 366 days (it's leap year). The following
Christmas, Brother Paul rises and says, "I am fed up with this
constant bickering!"