Why does he mention "pop-up book" here? Does he say this as a meaning of comforting the kid?
Pop-up books are 3D picture books made for children. 3D paper pictures "pop up" as you flip open each page, hence the name. Joey asks how he can sleep with the woman, and Chandler jokes that he learnt about how to do it through a "pop-up book." There is no child being referred to in the video, it is actually a dirty joke that references learning how to sleep with someone through books. Ex: I bought my son a pop-up book about cars. Ex: Pop-up books are great for visual learners.