Ron Tisdale wrote:
I like my flinch reaction.
I don't want to do anything to stiffle it unconciously.
Interestingly, Bruce Lee recommended this training, throwing water into each others eyes. On the other hand, Takuan wrote to Yagyu (or maybe the other way around) that if something comes at your eyes and you blink, this is natural. If it comes again and you don't blink, this indicates a disturbed mind. I'm gonna keep my flinch too.