It is not in this case at least. The method relies on using a device (usually a ring) to push the testicles hiver in your body, and the temperature there is enough to stop spermatogenesis. The current method involves stopping every 3 years for at l’East 6 months to ensure production returns to normal. There is no documented side effect, though it should be noted that as always in this area, fully documented medical trial are pending. You my ne referring to other methods using higher temps or external device such as heating boxer but i have not experienced not researched those so i cannot answer you.