"Sitting on the sofa on a Sunday afternoon.
Going to the can to mast******."

The story:

I'm active on a web forum (message board), and in an off-topic forum there was a thread listing songs that reference m**********n. I thought of Mrs. Robinson, and checked a lyrics website to verify before posting to the message board. When I saw the lyrics on the first site, I assumed they were either wrong, or had been whitewashed by somebody. I then checked 5 other lyrics databases, and saw that all of them had the same lyric.