The trouble is some MC's patrol the scansion and the rhyme so closeley that you would think that when it comes to Limericks that they were God. 'nuf said.
[merely a comment - I cannot do line 5] (plump) That's uncanny! I put up the same first line about 2 yrs ago in MCPants and the 2nd line was "who cut off his bollocks and ate 'em". Was that you? An even more shameless recycling than mine, and, ahem, it scans a bit better. :-)