Thats not right. The needle is set to a certain length on every single tattoo machine UNLESS the tattoo artist is a mooke and has no idea what hes doing. The needle is put in all the way unless it is just to go over a line just done then it can be skimmed over. Sorry i dont mean to sound like an asshole or anything. Also from exp the worse places to get tattooed is stomach chest ,back of neck and back, feet and hands.. Getting your dick tattooed too doesnt feel so great but i doubt anyone on this site will get this done so haha im just wasting my breath.