I think I do. Maybe I can answer quoting the Grimm tales. Seems fair.
Though I'm worried about your inability or unwillingness to understand that values can exist independantly of any 'god', they just need to be shared between humans to have a social existence and be shared through language and behavior. And people just so happen to have basically the same genotype, the same 'hardware' to communicate in a meaningful way. But the fact that people often also misunderstand each other and disagree on values also hints at the fact that there isn't any 'values in the sky'. Our genotypes aren't all the same yet similar enough to allow for reproduction, in the same way our genotypes and phenotypes, experiences and cultures are dissimilar enough so that people won't agree about everything yet generally be able to convey and agree on most ideas if they speak what is considered to be the same language. edit: and of course the possibilities offered by culture allow for different preferences even when genotypes and social backgrounds are basically the same
Give a new born sugar or salt, they'll prefer sugar.
That's a behavior you can observe. It's also an internal state, a set of information in a brain you can also observe. Something will be preferable because it, for example, stimulates the reward centers of the brain. We do have innate 'tastes' and preferences and learned preferences based on interactions between genotype, phenotype and cultural data (knowledge, the memesphere, social geshtalts..). Those natural preferences will become the 'hardware' other socially acquired and evolved 'values' will run on. A simple example of that is how we associate 'good' with far more similar than dissimilar sets of expressions and behaviors all over the world even in different cultures.
'Good' people, things and feelings are warm, up, attractive or even 'sexy'.
Bad people, things and feelings are cold, down, repulsive, to be avoided...
Animals need to evolve preferences, it's a survival trait. They need to prefer eating safe nourishing food rather than poisonous mushrooms, to try to mate with their species rather than predators etc. The behaviors that translate into added reproductive rates will be correlated with the replicators that allowed for it (genes and memes in humans) and transmitted unto the next generations while other less successful strategies will be slowly weeded out of the gene and memepool. Then of course since in the case of genes there aren't enough of them to code for every little detail and evolution didn't have infinite time in a stable environment to perfect everything so the system itself will have 'quicks', redundancies, useless code, bad wiring (and it does). What counts is that it was relatively 'better'\prefered (through survival and reproduction) than the alternatives as a whole and at the time.