A. The man tases himself right as he is climaxes which transfers the electric shock to the woman
B. The woman tases herself as the man is climaxing causing him to receive the electric shock
C. The man and woman both tase themselves as soon as one or both of them climaxes
Essentially, you have to masturbate into an electrical socket/outlet and make sure your aim is good.
AM: Yeah. He's probably doing the electric eel.....
CP: When you jack it with your dick in an electrical socket?
TY: Yeah and your jizz connects your body to the electricity so you get a shock.
All: haha he probably is