Your first heart was paid for by mom. Lots of caloric and emotional costs

But if it tasted fine, our poop would probably taste fine, and then we might be more inclined to eat it which would be unhealthy. I think that's why poop usually smells bad, so that we don't eat it and get sick or waste energy digesting non nutritious substances

I think taste is what drives us to do/obtain what is healthy to eat and/or partake in, with these tastes being shaped by natural selection to actually drive us towards healthy, survival benefiting behaviors. We need to poop, so I don't think it would be likely to develop taste buds that would cause us to actively avoid a necessary function

I'd say ya if it's a nice decoration for nice people, and if the alternative is just tossing it out

But I'd say the plant response is still a simpler mechanism than an animals flight or fight response, with many animals actually having a complex nervous system to choose a response and to actually be able to perform the (I'd say) more complicated response. Like for a plant, if it senses any damage, it would probably respond in the same fashion for the most part for all damage done, whereas lots of animals when damaged will consider many factors and their variance, like the amount of damage, the mode of damage, and how much danger it is still in (at least we can infer from how they respond to variances in the parameters), which will subsequently change its potentially complex response (like place foot here, balance, activate muscle fibers to move in a particular chosen direction, avoid obstacles, etc), which itself could be highly varying. I'd say this complexity in an animal's decision making makes it more likely that animals have feelings compared to plants, which while they may send out signals similar to ours in response to damage, they dont seem to be complex enough to make varying decisions based on those signals (which in animals would probably be interpreted as feelings).

Well I think things like plants probably dont care on an emotional level, since it seems like all of their responses to external factors could be explained by simpler chemical mechanisms happening naturally. And ya, i agree that most animals seem like they want to live.

Have you seen your fat momma?

I eat meat, but did you know cows have best friends, they play, and are curious?

I think you could infer the morality based on the organism's response to external stimuli. Like if you were to hold something down and it actively attempts to flee, then you could infer that it probably feels something that drives it to try and live, so maybe it might be morally wrong to kill something that maybe feels like it wants to live.