Ok, all juvenile potty humor aside. Once you've tried these you will think not having one is dirty and gross.
Pros:
1. You're actually clean as opposed to not actually clean. You can decide how important that is to you.
2. Assuming you don't want to spend 4k on a fancy Toto all in one commode, you can get a washlet attachment for your current toilet for about $60.
3. You can get as fancy as you'd like. Heated water yet (yes), heated dryer fan (yes), variable pressure and directional settings (very helpful), seat heater, odor control, motion detection night light, auto seat lift/closure, self cleaning cycle...etc. the base models are cold water with a adjustments.
Cons:
1. You will still need TP, but less because you will wipe less.
2. The washlet units should be detached and cleaned on a regular basis with the rest of the bathroom.
3. The higher end units do use up electricity for the heating and lighting features, so you will want to consider if heating your toilet seat 24/7 or running the night light is worth it to you.
4. For the one needing electricity you will need a reachable GFI outlet. Easy during a renovation, more difficult later.
5. Depending on your skill level, you may experience some splatter under the flight deck. After a few test flights, you'll figure it out.
This is the best combo of options for the money if you're looking for a first class experience.