Opening doors for my wife still after 15 years

My coworkers give me grief about opening car doors for my wife but I don't care. Been doing it since we started dating and I'm not stopping now. Not because she can't do it herself obviously, but because it's about demonstrating that you value someone. It takes three seconds. Last week my 5 year old asked why I do it and I told him that's how you show respect to the people you love. He's been trying to open doors for his mom at the store ever since. That's a win in my book.