In one of the dystopic dark future worlds, I would probably be a person who sells the experience of her menstrual period cramps to the interested adrenaline junkies

HeavyPeriodPainCrapms generator would be a facility of the two rooms connected with electro conductors which would transmit electrical signals of the brain and muscle activity during period pain in real-time from me as a provider to the recipient.

In both rooms, there would be electrodes to put on the body, for recording the pain or sensing the simulation of the same. There is no other two-way communication channel between the rooms.