In my personal, yet humble, opinion, we humans were intended to keep our two feet on the ground most of our time awake (except possibly when relaxing in any comfortable couch that comes our way).
I have come to realize, however, that not everyone agrees with me. Some even wildly enjoyed climbing 15 metres up the walls at Solna's Climbing Center.
Admittedly, the place was clean and the instructors friendly enough. The crowded carpets and the persistent smell of sweat I guess may be things you have to put up with when accompanying would-be mountain-climbers.