Expertise

Is not needed here. This is the very basic of what a nipple is: "In its most general form, a nipple is a structure from which a fluid emanates." I'm really not sure on what basis you're criticizing things here. I'm not sure why you're making the Hyneman reference either, I love watching Mythbusters and they tend to focus more on a physics/chemistry perspective than a biological one. You probably get more biology watching Deadliest Warrior with those awesome gel things. Although I guess on occasion both shows use an equal amount of pig corpses.