Navel VS metal stick

How strong is Kevin's belly? Need to check it out! You need to take a metal stick and press it into the guy's stomach. But he can say no, so he needs to be tied up! A metal stick will be pressed into the stomach of a bound guy - to the full depth! Straight to the gut! When this is not enough, then Alex will tie him to a chair and put him so that his stomach will stretch and then he will be able to have fun with Kevin`s belly! The abdomen is as flat and stretched as possible! So it's time to push the stick even deeper! But then there was a hammer at hand ... and the guy is still stretched and his stomach is defenceless ...