1. Can one practice only Vajroli Mudra without practicing other rites?

2. Is erection necessary for transmutation during Vajroli Mudra as a male? I do not get an erection when I perform Vajroli Mudra, mostly due to applying the massage only briefly due to holding breath.

3. What can this mean that I could not have success with other transmutation techniques for singles, like pranayama but when I practice Vajroli Mudra it seems to dry all the urges and keep me away from falling into masturbation.

Thanks a lot.