Dental work....YOW! I've been true to my teeth all my life and up until lately, they haven't been false to me. BUT now things are beginning to fall apart and even though I have a dental policy, it doesn't cover all the cost of the treatments. I had to have two crowns this year so far and I'm pretty sure a root-canal is lurking around the corner. Then there was the "deep cleaning", which is the Spanish Inquisition of the dental world and, of course, barely covered by insurance. More fun ahead.....
Another thing that nobody plans on is the cost of going to out-of-town funerals. We get older, EVERYBODY we are related to or know gets older and the funeral music starts playing. I spent a lot of money going back and forth to my mother's house for months, eight hours driving each way, wear and tear on the car/tires/me. I had other deaths in the family and close friends circle that normally I would have been driving/flying to funerals for, but, of course, I didn't attend because of Covid. But as things loosen up, I figure there are a lot of them in my future.
Weddings, too, are expensive to attend, but at least you get some cake and some booze and have fun!