To answer this riddle, one must only know what a fishmonger is.
Yeah, but you've got a fishmonger, who sells fish, and an ironmonger, who makes stuff out of iron.
So, does a cuntmonger sell cunts or make stuff out of them?
Well a hatemonger promotes hate in everything. Does a cunt monger promote cunts in everything?
And a warmongrer instigates war. Does a cuntmongerer intstigate cunts?
How do you instigate a cunt anyhow?