The Lowdown: This is probably the biggest decision you’ll make for your bathroom. It’s all about how the bidet water gets warm.

• Instant Heating: Think of this like a tankless water heater for your butt. It heats the water on demand as it flows through the nozzle.

  • Why it’s better: It’s way more hygienic because you’re using fresh, running water every time—no stagnant water sitting in a tank. Plus, the warm water never runs out, and the toilet design is usually much sleeker.

  • The Verdict: It costs a bit more upfront, but go with Instant Heating. It’s cleaner and you won't get a "cold shock" halfway through your business.

• Tank Heating: This keeps a small reservoir of water warm inside the toilet at all times.

  • The Downside: It’s basically a breeding ground for bacteria because that warm water just sits there. Also, if you’re a "long-trip" kind of person, the warm water will eventually run out and turn chilly.