I wouldn't eat it on a day-to-day basis. I'm just curious on what human tastes like.
It tastes like shit. Most creatures have it to discourage eating their own.
No it doesn't, and that is blatantly false.
By most accounts I've heard, it tastes pretty good. There was an interesting interview with someone who had done extensive research on the subject, including interviews with some modern tribes who still occasionally practice it. For the most part, it isn't practiced for cultural reasons or because they didn't have enough food; it was because they really liked the taste of the meat.
Beyond that, your statement is quite obviously false. For one, it's entirely at odds with evolution; the species distinction is entirely invented, and so no way of determining what is your species could possibly exist which didn't blur over into a few million years of evolutionary cousins. Secondly, producing such a species tagging mechanism would require an increase in energy needs, cancelling out any tiny benefit it could give in terms of cannibalism; and so even if such a thing did somehow magic into the population, it would disappear in fairly short order.
tldr; version: it all tastes like chicken. Meat is meat is meat. And while there is some variation based on conditions of the muscle tissue, meat will pretty much always taste like meat. Because from an evolutionary standpoint, you generally don't evolve your muscles to optimize taste; you evolve them to optimize their function as muscles.