'A Low, Guttural Tongue-Flapping Noise' - Season 2, Episode 19
After Charlie takes Alan to an eye doctor, they end up at cafe where they bump into Charlie's ex-girlfriend, Sherri. While there Alan shows an interest in Sherri, and decides to ask her out. The problem is that Alan can't get over Sherri's relationship with Charlie.
Air Date: March 20th 2005.
Alan: I took a piece of whole wheat toast to the eye.
Alan: What does sex have to do with marriage?