"...there has forever been jokes about what might be under their kilts."
Dude, we know what's under the kilt. This is not speculation as to the mysteries of the universe. We do not need to build an enormous Hadron supercollider spanning the borders of France and Switzerland to accelerate quantum particles to unthinkable speeds then smash them together to delve into the question of what might be under someone's kilt.
It's a penis, they keep a penis under their kilts.
P.S. - I broke my leg, and had to walk around with a cane for about two months. I lived it up - complaining about fast kids and slow elevators, whining about the rising costs of things, and generally being a cranky old person. So, no worries - even those 25 years your junior have, at times, also been 25 years your senior.