I believe one of the reasons many used to cirsumcise is to hinder masturbation.
The feeling of the foreskin going up and down your cockhead is really the whole thing in masturbation for an uncut guy.
I don't know of course but it seems to me that without foreskin you would need lubricant
I dont know the best way to masturbate, but the worst is when your on coke. You just cant get off. But sex on the other hand, no pun intended is great on it!