Youāre totally correct, this is called ācock milkingā and is an extremely intense experience for the sub. As opposed to edging, where orgasm is delayed as long as possible, during a period of milking, the domās goal is to make the sub ejaculate quickly and repeatedly, either until the agreed-upon milking timeframe elapses, a certain ejaculation quota is achieved (# of orgasms or volume of ejaculate), or until the sub has been āmilked dry,ā i.e. subsequent orgasms do not result in the emission of any fluid whatsoever from the penis. These ādry orgasmsā and even those leading up to them are quite painful for the sub, so it is almost always necessary to make sure the sub is securely restrained, ideally at 8 points: wrists, ankles, thighs, hips. This ensures that the subās pelvis remains stable through the increasingly intense orgasms.