If there’s one thing everybody has in common, it’s getting older. From newborn babies to baby boomers, there’s no escaping it. “Gray Matters” is skewed to that vast generation of boomers. But since getting older means adapting to changing circumstances, lots of readers—old and young alike—can relate to and laugh along with our characters. Don’t let the name of the strip throw you: The cast of “Gray Matters” is anything but colorless as they struggle to keep up with the rapid changes in society, culture, technology, the workplace, their families and, of course, their bodies.