Just before lockdown here a friend of mine's son was out with some school friends driving back to school (licence allowed at 16 here). The 17 year old driver decided it was a good idea to stop where he knew an electric fence was in operation and see if direct application of same to his 'old man' would in any way provide a thrill. Some effect, I am sure, but history does not yet relate if this will become a craze.Gave you a stiff one didn't it Bob, however the wrong kind.
I drew my friend's attention to the topic of electro-ejaculation but suggested that she should not point it out to her son lest the Lower Sixth went into production using the resources of the school labs.
All I can say from personal experience is that when Mr. Gaillard connected the class in series with a rheostat across the mains at no point in the gradually increasing current was there any hardening effect (and at that age almost every other stimulation did have).