Yes, I know how very fortunate I am to be able to do this. Chalk it up to going into a fairly well-paid field (software engineering), living below our means, and not being able to have children. I figured if I couldn't be a mom, I should at least take advantage of one of the perks of not having to save for college educations: early retirement. Things would be very different if we'd had children, and I'm sure I'd be working until 62 at least.

