“What’s the key to making marriage last?”
Almost anybody with a properly functioning arm and a working pair of eyeballs can hit a dartboard. It’s a lot harder to hit the bullseye. If you asked me “What’s a key to making marriage last?” or “What are some important ways to make a marriage last?”, well, that’s easy. When you ask, “What’s the key?”, that’s much tougher.
Do I really have to pick just one?