Gerard and Mikey? Did I Hear That Right?

Last night Mad Men aired a repeat of the Three Sundays episode from Season 2, during which the new parish priest joins one of the characters' family for a meal. Just as the family is about to sit down at the table one of them yells "Gerard, Mikey! Wash your hands!". This is the second time I've seen this episode. How did I miss this? -K