If you really want to know, be an technician. There's nothing like a high voltage arc to sear flesh. If it happens to your finger, your mouth may be there fastest way to extinguish it. It smells and tastes like pork on the grill. This would be reasonable since the biological composition of swine is very close to ours. It's also why pigs are used to test many products for human use such as makeup.
The older the animal, the tougher the meat. The degree to which the muscles are exercised also makes a difference. The best human meat would therefore be an overweight elementary school couch potato. To make the meat even more tender, feed the animal nothing but milk for the last couple of months before you eat it, just like a veal calf.
If you want to eat the meat of a full grown adult, you have to tenderize it. Some cannibal tribes only ate certain parts that were more tender after long, slow roasting. Others boiled it for a long time although it would sometimes get stringy. Tribes that consumed it for ritual would cremate the body and add the ashes to a broth. But, why be old fashion. There are more modern ways to prepare it. Put the meat in a slow cooker. Add seasonings like salt, sage and thyme. Fill the cooker with water until the meat is about halfway submersed and let it cook slowly for about ten hours. (you can add potatoes and carrots about two hours before it is finished.) If you are in a hurry, use a pressure cooker which should cook and tenderize the meat in a about thirty minutes.
One word of advice: A tribe of cannibals in New Guinea developed a illness similar to Mad Cow Disease. It was found to come from eating human brains. So, stay clear of the brains and spinal column. Don't invite a prion into you life;-)