So resulting from the previous post I noticed that a group of Apes is called a "Shrewdness"?
That is entirely a new one on me.
When I saw them referred to collectively as an "irritation" I chuckled once more. The joke must be unstated to contrast dryly the pachyderm.
I tried to look it up separately and, well, it's something of an ass scratcher.
The third return is:
"Caused usually by irritation in the perineal area, chiefly anal sac irritation. across .... Gibbons, a group of apes that are much smaller than orangutans, ..."