In the episode Lookin' For Love (in all the wrong barrels) , K'nuckles' falls in love with his reflection in the window of a wig store. Flapjack purchases the wig, a mirror and a dress and proceeds to follow K'nuckles around on a 'date' so as to not destroy his fantasy.
Unfortunately for Flapjack, Captain K'nuckles decides to marry the mirror, and together they somehow have six hat/wig wearing mirror children.