Cut about a half inch into you stomach fat than syphon it out. I lost 12 pounds and my gallbladder doing that.
...of course the fun alternative is jerking.
__________________
Gas and masturbation are highly unlikely to be connected with each other. Have you tried to stop masturbating? Has the gas subsided as a result? Perhaps you could try the same experiment by increasing the times you masturbate daily. Do you notice that the gas is increasing?