I figure that if a pineapple plant has any opinion at all, it wants a large animal to come along, take the pineapple and walk off with it somewhere to eat it. Core optional. Then the top can root wherever it dropped and the plant has propagated itself. Growing sweet fruit sucks up a lot of energy and the evolutionary advantage is that something will eat the fruit and help the children spread out. I've eaten pineapple core, cut up, without any ill effect ... argghhhhh ... what's happening ... I'm melting!