Angelina Mostly these were for female belts and mostly the suggested methods had not been thought about or they never would have been suggested to me. Orgasm for some women at least is possible from nipple stimulation, pain, and mental stimulation. Detecting these sorts of orgasm would be the purpose of 5 and 6.
Suggested methods of detection:-
1). Moisture sensor on the secondary shield. They forgot about urination.
2). Vaginal probe with moisture sensor. They forgot about periods and I would expect an unaroused vagina to still be moist enough to activate the probe.
3). Vaginal probe with pH sensor. Maybe but what is the normal vaginal pH and how if at all does it change with arousal?
4). Pulse Oximeter reading blood flow in the labia that might have worked but the equipment was bulky at the time with modern sensors MAYBE.
5). Some magic way of reading brain waves. You might be able to do it in a laboratory with an EEG machine but in the real world no chance.
6). Permanent anal plug with a pressure transducer that reads the characteristic muscle contractions of orgasm. Well, this is documented in several studies so the sensor would work but the impossibility of a permanent anal plug never crossed their mind.
The only possible idea was a male belt with a pressure sensor in the tube and at the time power consumption, cost and size made it impractical.