A nun1 was walking in the convent when one of the priests noticed she was gaining a little weight. Gaining a little weight are we sister Susan? he asked.
No, Father. Just a little gas, Sister Susan explained.
A month or so later the priest noticed that she had gained even more weight. Gaining some weight are we Sister Susan? he asked again.
Oh no, Father. Just a little gas, she replied again.
A couple of months later the priest noticed Sister Susan pushing a baby carriage around the convent. He leaned over and looked in the carriage and said, Cute little fart.