From an Amazon customer review of the anthology Guys Write For Guys Read:
[...] there is also an illustration of a monster, drawn when the artist was in fifth grade, I believe, that shows the monster's genitalia. It's unobtrusive, but its [sic] there. I'm having to black it out with a felt-tip so I can make the book available for my middle school students.
He's talking about my Sprokostagorubolonoso. Unobtrusive is probably the worst thing one can say about a penis.
Here's the culprit: