"Oath of Silence" joke

Heard this from a friend:
A middle-class man decides to go off and join a monastery which
requires an oath of silence. No speech is allowed except for
two words every 5 years, to sum up one's experiences to the head
monk.
After the first 5 years, the monk asked him what two words described
his experiences and all he said was "HARD BEDS."
When the next 5 year period came, the monk asked how things were
and he replied "BAD FOOD."
After 5 more years, he walked up to the monk and said, "I QUIT!"
The monk nodded and muttered "Yes, this doesn't surprise me.
You've been doing nothing but complaining for the past 15 years!"