When I retired 8 years ago I decided that the expense of coloring my hair was one I could let go. Then I got a very serious melanoma (cancer) on my face and I knew I'd never use chemicals on my head again. (Not that the coloring caused the cancer, it didn't, but I just don't want to use chemicals I don't need now.)
Now I'm learning to quilt and building a stash- who wants to spend my retirement money on hair coloring, I need more fabric! :-D