Hi Hairyman 101, i have,nt yet got me one of those robojacs yet, but what your saying about yours sounds incredible! Jesus! That must be the holy grail of sex, to be able to have an orgasm that goes on for how long you want! Does modifying the tube still make it safe to use, as i,m a bit concerned about any sucking device. I would appreciate any advice about the robojac before i buy. Do you know if anyone is selling one? See ya, Ozypumpa.