I don't remember if I saw that movie or not but it sounds very familiar. The movie I saw I gave the impression that it was simply a rim job with ice play.  Unless you get a rim job on a daily basis the act alone would be enough to fire you up.  I can't imagine very many warm liquids that could be used without iritating the anus.  Any warm liquer or hard alcohol would be bad in my book.  Maybe red wine, maybe a warm mild drink, (tea, cocoa etc...)  But if the shoe was on the other foot I wouldn't go overboard on the warm liquor. One of the best ways to help relax someone's bowels is with a warm bath - nuff said there.