The
man who only dated caves didn't tell people about his cave thing. He
thought his friends and coworkers would be alarmed by it if they knew.
A lot of times, people are intolerant of those who are different. Like,
say, if they are covered in a thin layer of red hair, or they have been
born with no sweat glands (a REAL problem!), or they have a hairlip, or
they are only attracted sexually to naturally occurring cavities in the
sides of mountains that are big enough for a man to enter.
This could've been a real problem for him, work-wise. Career-wise.
So he kept it to himself.