“Poop Talk” is an open and honest (and hilarious) look at a taboo topic in today’s society. The docu-comedy gives an inside look at all things poop — from uncensored, embarrassing moments to scientific explanations recounted by 50 experts and comedians including Kumail Nanjiani, Nicole Byer, Adam Carolla, Rob Corddry, Nikki Glaser, Pete Holmes, Eric …