step one: pour alcohol on a boob
step two: make incision at top of same boob
step three: put peltier heater in silicon mold, wait for it to dry
step four: put bandaid on until its dried
step five: rip that bandaid off and stick the petlier heater in there
step six: immediately repeat for other boob. you can put a band aid on both of them once you are done.

oh by the way this is very safe for you as long as you reach orgasm only after completing the operation. the extra NATURAL pain blocking is required for this.