Not only will a bidet save you on toilet paper, but you will actually feel like you have a clean butt after pooping. Initially it feels weird, but after you get used to it, you won’t want to poop without it.
BTW in case you are wondering: yes, you still need toilet paper to wipe the water off. But it is a small amount.
I feel like a dirty savage when I have to poop in strange bathrooms. Took me 45 years to realize that bidet is the way.