A: They're like the universe's own special brand of cosmic waves. Like, imagine you're on a cosmic beach, feeling the ripples of the fabric of spacetime beneath your feet. Except, you know, it's not a beach, it's the universe.
A: Ha! No, you can't surf them. That's just not how it works. But wouldn't that be something?
A: Only if you're a human made of matter. Otherwise, you're good. The waves are just a gentle reminder that the universe doesn't care about you, but it does care about its own gravitational field.
A: Not with your naked eye, no. But you can see their effects. Like, have you ever noticed how your coffee cup doesn't wobble on your table? That's them at work.