Simply put: your body knows you are operating at a caloric surplus NOW. But it can't assume you will be operating at a caloric surplus for the indefinite future

Simply put: your body knows you are operating at a caloric surplus NOW. But it can't assume you will be operating at a caloric surplus for the indefinite future. Your body doesn't want to behave like a professional athlete who spends all the money from their first contract only to have a career ending injury and wind up broke.