When is a Senior Considered a Senior?

I’m somewhat perplexed; since when does the designation “senior” start at 50 years old?

Photo of 100-year-old Lester Wright by Author

AARP:

A number of years ago, I noticed the AARP has expanded its reach by dropping the age required to join. Now you can sign up for a membership at any age. Oh, yeah — there’s the small print “Limitations may exist on some…