Geometry. Chuckle. 

Back in high school, I avoided trig, calculus, chemistry, physics, biology and, especially, quantum physics.  I even avoided algebra, and the wits at the top waited until the last quarter of my senior year to tell me I had to have it to graduate. Subsequently, I had to complete it in that quarter to graduate.

Years down the road, when I did a LOT of work with engineers (Keyport (NTS/NUWES) and Bangor, Washington) and might have got exposed to a bit of it while playing with electron transport and manipulation systems, I figured out it could be fun to play with, in some applications. 

Later, I found out a bit more about the whole "Horton Hears a Who" thing and was sad I had thought such things were only for the Brainiacs. What a fascinating direction, while everyone else was trying to look farther and farther out into space.

Back to that geometry thing. Two professors lived next door to me. The wife version would bring over muffins and things so the kid bachelor wouldn't starve eating his own cooking (it might really have been a thing).  One day, she remarked, "[y]ou sure do a lot of geometry." I was, sincerely, clueless.  She pointed at different things I had going on around my shop and explained it to me.

Gads I've spent a lot of time honing that "dumb" thing.