Having 6 copies of every DeadBase ever printed (kidding, I'm just kidding 😉), I count 14 second set Candymans, the last being 7-7-81 in Kansas City.
Just did a quick search on https://www.setlist.fm/song/grateful-dead/candyman-4bd687ee.html
Clicked on about 7 shows and they all played Candyman in the 1st set, so you might be onto something.
A woman walks out of the shower, winks at her boyfriend, and says, "Honey, I shaved myself down there. Do you know what that means?"
The boyfriend says, "Yeah, it means the drain is clogged again."