That could be a porno
A term used like a "That's what she said," or a "Yo momma," or any of the sort. Only difference is it could be the title of a porno movie.
guy1: "I got the munchies!"
guy2: "That could be a porno."
girl1: "We had fun last night."
girl2: "That could be a porno."
person1: "...I'm new to this."
person2: "That could be a porno."
guy2: "That could be a porno."
girl1: "We had fun last night."
girl2: "That could be a porno."
person1: "...I'm new to this."
person2: "That could be a porno."