AndyF said:
This is easy.
The bigger and bushier the facial hair, the less likely a caver is to have a wife or girlfriend.
Therefore they get to do a lot more caving and are therefore progressively "harder" and more respected. :
(Retires now to safe distance)
An interesting observation.
I have noticed that some of the most serious cavers (or in fact practitioners of other sports/pastimes too) are often the most odd or socially maladjusted.
Perhaps people who are 'normal' end up tagging along with the normal crowd and doing normal things - and that sure as hell doesn't include caving.
Conversely, those that find it hard to fit into the 'normal' crowd often go out alone and do odd things, and frequently end up with unusual hobbies such as caving.
Many (perhaps even most) of the people I have met caving are odd in some way - and it is often their unique oddity that is the key attribute that makes them good at what they do, in this case caving.
So thumbs up for individuality, non-conformism and idiosyncracies - they truly make the world go round.
I'd like to say I buck the trend and am really a 'normal' person, but that'd be a lie!