I'm not sure what your problem(s) is/are. A limerick is a structure, not a cultural statement. It requires you to think through the rhymes while, at the same time, trying to make some sense and include the set words (in this case). It is a five-line poem. The content can be subtle and poetic or it can be a linguistic sledgehammer. As in all poetry. Years ago we used to play all kinds of poetry games here. This was one of the really fun ones.

I think I've made a mistake coming back. Easily rectified.

The idiot also known as Capfka ...