Hobbits routinely live for more than 100 years in good health
Fact:
Hobbits are shown to be able to have large families
Fact:
The population density of the shire still seems relatively low
Hypothesis:
Hobbit condoms??
“What?? That’s horrible! Why would I do that?”
“You don’t get to eat until you do.”
...
“FUCK THOSE WEE FUCKERS ITS DISTRICT ELEVENSIES TIME”