Heated toilet water is very easy to do actually.. just switch your toilet from using the cold water line, to the hot. My neighbor'* house was hooked up that way on accident and they ended up leaving it that way. What are you doing, sh*tting bricks man? lol. I don't have that "splash" problem.
Same thing happened at my house as well. A nice little comfort on those cold winter days.
that and heated seats. if we can have heated seats in our bonnies why not have a heated toliet bowl.