Knock knock English joke Series of knock-knock jokes between Guy and me: Me: Knock knock Guy: Who's there? Me: To Guy: To who? Me: It's 'to whom' you dingus, let's try it again. Knock knock Guy: Who's there? Me: From Guy: From...whom? Me: Ok. Congratulations on basic grammar. One more time. Knock knock Guy: Who's there? Me: At Guy: At whom Me: Gesundheit -Edit for spacing