From Gard Webster, this was published on the groaners listserv. The author is not known.

There was this nun named Sister Mary, who though she tried and tried, could never please the Mother Superior. One day she comes up with an idea: Since the abbey was always cold, she decided to cut some wood and build a fire in the fireplace to heat the place up.

She spent all day chopping, hauling and stacking wood. Subsequently, she wound up shredding … Read the rest...