Heh. I was around forty-two and still presenting as female. Went to a campus lecture to hear Famous Author speak. Afterward, I stood around with him, a couple of profs, and a librarian or two. I had brought along a copy of one of his books; after Famous Author autographed it, I turned to one of the profs and said, "Actually, this is the very same copy I bought for your X class at Y school about twenty years ago!" One of the librarians did a bit of a double-take and said, "I have trouble believing you were ANYwhere twenty years ago."
I should have started HRT then, I think; I started just as I was beginning to truly age. Then they would still think I'm in my twenties. Nowadays, most people think I am thirtyish or, worst case, in my thirties. I don't see how they miss the skin that is starting to relax and the gray that is fast coming in at my temples...
Then again, at least I don't have to worry about being carded or banished from the library. And sometimes I want to own my age. It's a bit annoying when people say that I wouldn't know a certain thing or won't have experienced something because I'm too young.