Sn success rate

[regular john]

Is it high rate ?

 

[reverieheart]

83%

 

[divinemistress36]

83%

Im wondering if the 17% fail is from not following the protocol right and or calling for help

 

[roommate]

Yea same

Im wondering if the 17% fail is from not following the protocol right and or calling for help

 

[locked*n*loaded]

How can anyone possibly know any success rate of SN that is at all accurate? Where does that 83% come from? Source please.