Can anybody please explain in simple English, what a minor sixth is? If you're just going to copy and paste the Wikipedia version or try to strut your musicological expertise, please don't bother. There is more than enough terminological circumlocuation extant.

In other words, what effing notes does one play? For example, 1, 3, 5, 6 or 1, 3, 5, 6b? Or 1, 3b 5 6b for minor?

Help appreciated.