Chris, I don't know if you have seen the second Bicycle Man episode but in that one, the child molester showed Arnold and Willis an X-rated cartoon called Murphy Mouse. Was there really a Murphy Mouse cartoon or did they just make it up?

I remember someone on here saying a long time ago that they had seen the video of it at their local rental so I think it did really exist.

I think that it was invented for the episode. However, Fritz the Cat had adult themes. It was popular during the 70s.

I think the better question is: Why was Dudley so turned on by it?

I'm going with the idea it was made up for the episode as someone else mentioned Fritz the Cat was probably the inspiration.