I came here to post the same thing.

When I was in college getting my Computer Science degree, whenever I was stumped on a programming project, I would try to explain the problem to my wife, who had absolutely no idea what I was talking about. Sometimes I would even pull out a dry erase board to draw the problem for her. Every time, I would be in the middle of explaining it to her and have one of those eureka moments and run to code the solution that I just came up with in my head while explaining it.

I still do this to this day when working on a project for work as a software engineer. It happens less and less, but it still happens.