In this ESL lesson plan for adults and teens, students watch a video and do a listening exercise on a scene from 'The Big Bang Theory' series when Sheldon and Penny share secrets. It includes discussion questions, conversation, and other activities about interesting personal facts. Students also learn some important vocabulary terms, expressions, and phrases from the video. The grammar exercise features the past modal - should + have + past participle. There is also a quiz & review section with a bonus activity.