Herein, what does it taste like or how does it taste like?
A typical answer might be, “it's pretty good, but it needs more salt,” or, “I thought it would be bitter, but it's actually sweet!” But usually when someone asks that they just want to know whether you think it tastes good or bad. So when you ask someone, “What does it taste like?”, you are asking for comparisons.
Secondly, what taste means? : the sweet, sour, bitter, or salty quality of a thing that you can sense when it is in your mouth : the flavor that you can taste when you eat or drink something. : the ability to notice or recognize flavors when you eat or drink : the ability to taste things.
Keeping this in view, what is the taste of poop?
Human faeces taste bitter because of bile, which is secreted by the liver and stored in the gall bladder. The food crumbs left inside faeces are tasteless. We assume that the taste of faces is relatively caused by the scent.
How do you ask food taste?
#1 means you're asking for a comparison or a description. For example, I might respond with "It tastes like apple" or "It tastes sweet." #3 is more like you're asking whether it's good or bad. "It tastes delicious" or "It tastes nasty." #2 is kind of ambiguous. You could respond either of the previous ways.