Toilet paper is the second option for me. Just having dry sheets of anything won't get a good clean.
The most confusing thing to me is whenever I visit relatives they always have a pot of water, like something that seems to be for watering plants, next to the toilet. I always wondered what that was for, but apparently they lean over, water their asshole, then dry it off. That seems like a lot of work.
If I had the money, I would get one of those toilets with a nob that cleans and dries your asshole as you are still sitting. That is luxury.