|What's wrong with a man balcony?|
The thing is, fundamentally, caves are pretty terrible. They're dark, windowless holes below ground. Why would I want to hang out there? I'll take a "man roof-top balcony with an ocean view" instead, please. Sure, building a waterfront vista into your home can be difficult, but I'd still prefer some sunlight and a tree or two rather than a cave.
I guess my point is "man cave" is a dumb expression and I wish we used something else. Also, it's always nice to be able to see outside.