The body learns associations. There are reproducible experiments with rats who develop a liking for chalk water after sugar is added to it; and it takes them a

The body learns associations. There are reproducible experiments with rats who develop a liking for chalk water after sugar is added to it; and it takes them a couple of weeks to stop liking it when sugar is out. There are some experiments showing the same is true with humans, with a time constant of 3-6 weeks. From memory, relevant papers are from Michel cabanac. Seth Robert’s “what makes food fattening” is a great overview of related results, whether or nit you agree with his take.