Wanktastrophe?

I got some second hand wanking advice at work today. The crazy guy (who just can't shut up and be still) came up to me and told me something the second in command of the machine shop had supposedly just said moments earlier. Apparently, if you sit on your hand until it goes numb, when you wank it feels like someone else's hand. Honestly, I'm speechless. And, no, I'm not trying it out. At least not any time soon.