1. cup of hot water, dip your dick in it. (did it once)
2. fill a sock with uncooked rice, close the mouth of sock, microwave every time you want to warm it up. (tried that earlier)
3. Heating pads used for back and sore muscles. (use it now, since its right by my bed, and all it takes is switching it on) while i kegel.
4. hot shower.
did i miss anything