There is a married couple sitting on the edge of their bed with fishing poles,  gear and a tackle box. The man who is wearing a fishing vest and holding can of beer is in the middle of casting out his line while the woman watches him. The man appears to be talking.
It is unusual for anyone to be fishing from their bed in a bedroom.
Why are the couple fishing from their bed? What is the man saying to his wife?
I can't believe you used that line to get me in here.
scene: the bedroom description: There is a married couple sitting on the edge of their bed with fishing poles, gear and a tackle box. The man who is wearing a fishing vest and holding can of beer is in the middle of casting out his line while the woman watches him. The man appears to be talking. uncanny: It is unusual for anyone to be fishing from their bed in a bedroom. entities: Fishing, Practice_(learning_method). caption: I can't believe you used that line to get me in here.
A play on the word "line" --- without the fishing context, this quip refers to pickup lines, and how she can't believe a corny/lame pickup line that he used actually worked to make them romantically get together. But here, "line" refers to fishing lines --- so it appears she wasn't attracted by a pickup line, rather, she was attracted by the fishing line, which is a more specific attraction based on a somewhat niche hobby.