Sheets Posted on May 2, 2016May 2, 2010 by admin Knock-knock. Who’s there? Sheets. Sheets who? (Shih tzu) Woof. Woof. Spread the love Related posts: Knock Knock 130 Knock Knock 199 Knock KnockWho’s there?Twyla!Twyla who?Twyla light Knock KnockWho’s there?Tinker Bell!Tinker Bell