No, that's just one of many "theories" about how this particular biochemical works, but it is not in any way a proven fact since we don't really know how the br

No, that's just one of many "theories" about how this particular biochemical works, but it is not in any way a proven fact since we don't really know how the brain works in the first place, only what it looks like under certain conditions. "Dopamine hit" absolutely IS a thing though, because that term just refers to the fact that when dopamine producing areas of the brain light up in fMRI scans, people report feelings of pleasure. That's really all it means.