The weirdness of birthdays as you get older

Mrs. Phactor just "celebrated" her 70th birthday.  TPP did this some months back, so we can claim a cumulative 140 years, and it's hard to know exactly  what to feel.  Neither of us looks or feels ancient, and yet TPP thinks he's the first male in his lineage to live this long.  Neither of us has any threatening health conditions that prevent us from pursuing the  things we like.  Gardening is both our hobby and our exercise program, although we are committed to more travel.  A big old garden like ours always provides plenty to do.  This may not be your idea of retirement, but our gardens are quite important to us, and they can always be improved upon.  Hard to know exactly how to feel, and actually most of our friends in our Friday Seminar group are older, but not necessarily wiser; we're the kids so to speak. Actually many set a good example.  70 seemed old when it was the older generation. Now it doesn't seem so old, although Mrs. Phactor says I shouldn't buy any more little trees because they take so long to grow. Got a stick for a 50th birthday present, and now this Magnolia salicifolia is quite large for a 20 year old tree.