Disclaimer: I have not tried this.
EMS, or electronic muscle stimulation, is the practice of using electricity to train the muscles and nerves. On wiki it states that EMS is used for:
Prevention or retardation of disuse atrophy
Increasing local blood circulation
en.wikipedia.org/wiki/Electrical_muscle_stimulation
Many of us are having these problems both with penile tissue and throughout our bodies. Further FDA approved uses are:
Relaxation of muscle spasms
Muscle re-education
Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis
Maintaining or increasing range of motion
Aside from the prescription units which are basically electrodes there is one other approved belt-device in the USA that is advertised to train the entire core (and possibly all the way to the prostate/penis) called slendertone. Google it.
EMS may have further non-approved uses/benefits which I’m not prepared to discuss. The approved uses, especially increasing bloodflow and prevention or reversal of muscle atrophy, are why I’m posting this here.