I can't believe I had trouble easily finding this online, but here goes:

This was a quote my friends and I would once commonly use, but, after you get to being one of the oldest in your crowd, it is far less commonly used and rarely recognised!!!

I always thought WC Fields was responsible for this line, but strangely, my Search Engines have let me down :

"Sounds like a line from a song"

Okay, so who said it and in what film???

Thanks, R-J