Day 598 - The Curse of the BI-Clops!

So I’ve been behind on my web-comic-reading, but I visited the great Gastrophobia today for the first time in ages, and what I assume to be a throwaway line inspired me to draw this straight away - (See panel 5).  It may be that the exact same joke was made already over there, I haven’t worked far enough backwards yet (i.,e. at all) - apologies if that is the case.