Even though I consider myself pretty handy, my dh is the one that's really mechanically inclined, and will happily spend hours disassembling his mtb just to see how it works.

So it was a sweet moment when the following occurred the other day: my dh asked to borrow my road bike to go ride with a roadie colleague, I was helping him get out of the door in a hurry and pump up the tires, and the front tube blew. He was already late and about to call off the whole thing when I just told him "CALL your friend! Tell him you'll be 5 minutes late. I'll fix it!" and his jaw literally dropped as he saw how fast I switched the tube

A little practice on road tires goes a long way!