system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: are people born with a sweet tooth or do they develop it due to easy access to sugary foods in their childhood

Basically the title. I have seen many times that within the same family, some like sweets while others can barely stand them. Now assumimg all family members have equal access to the same foods, I want to believe its the former, but not entirely sure. Can somebody explain?
gpt
We are all hard wired to like calorically dense food, it is part of human evolution as it means we had to hunt less to survive.

There is also a gene variant called FGF21 that codes for a liver hormone which is produced after eating sweet food. People with particular variants were 20% more likely to be top ranking eaters of sweet food than people without according to a study in Denmark — it has not been completely elucidated yet though.