Japanese erotic toy manufacturer Ligre has just released a line of panties designed specifically to fit snugly over a regular pillow. Since one of the "unique and most attractive features" of the panty pillowcase is its ability to collect oils and sweat from users’ hair and heads as they sleep, the users can go months in between washing the pillowcase, making the pillowcase oily, grimy, and even more attractive for a certain subset of customers. 

Hey, Christmas is just around the corner!