if your circumcised can you masterbation?
Well sure you can. It doesn't matter if your circumsized or not.
Yes, but it's different, and most circumcised men apparently use some form of lube.
It's worth remembering that no-one except for Jewish people and Muslims would even be having this discussion if it weren't for the fact that 19th century doctors thought that :
a) masturbation caused various physical and mental problems (including epilepsy, convulsions, paralysis, tuberculosis etc), and
b) circumcision stopped masturbation.
Both of those sound ridiculous today I know, but that's how they thought back then, and that's how non-religious circumcision got started. If you don't believe me, then google this: "A Short History of Circumcision in North America In the Physicians' Own Words". Heck, they even passed laws against "self-pollution" as it was called.
Over a hundred years later, circumcised men keep looking for new ways to defend the practice.