[Chalky] - I just assumed that the plot outlined in the limerick in question happened in space... :) As for viagra, I thought of niagra (and had a vague idea that there might be an ejaculatory metaphor in there somewhere...) but couldn't think of a third rhyme but hoped others with bigger vocabularies might find one, or else employ a bit of creative twisting to still allow for a fun limerick - so bravo Marc for finding the "gouty pain in the clavicle".

---

I expanded my vocabulary