It means either people make-out, touch each other in an improper way, murder, or other things children dont or cant know about until they are a little older.
Films are delivered to movie theaters spooled on reels, and stored in cans. So, when the film is completed and ready for distribution, it is called being "in the can."
Get an email of one of the pornstars, send her some good nude photos of you and see how see can help. You can also audition for a movie. Sleep with the producer.