First of all what is a cum cube? A cum cube is when you make your male sub cum into an ice cube tray over and over again, until he fills a cube up, or even the whole tray!  That will take a lot of orgasms, and we know we don't want to give your "little" sub that much pleasure, but it could be done on a release day from chastity where you can milk as many orgasms out of him on one day for your tray as you can, and then be sure to lock him back up. You will need him locked up for a long time to put these cum cubes into play. Why should you make cum cubes? [...]