SUB ONE - STELLAR BLUEDESCRIPTION: The SUB. ONE stimulator is both powerful and ergonomic. Using tapping technology, it delivers incredible sensations and can be used with or without erection. This specificity makes the SUB. ONE an inclusive product that gives the greatest number of people access to pleasure, especially those suffering from erectile dysfunction. The SUB. ONE can also be used without lubricant, in which case no back and forth motion is required and all you