Be weighed on your toilet seat

This is the most unique toilet seat I've come across so far this year. It actually has a built-in digital scale. I don't know if it's a good idea or not. You can weigh yourself on it before doing the deed and check how much you weigh after. Does this really serve any purpose though? Except for knowing how much you had eaten the previous day of course. Well, I guess Haikun Deng, the creator of this toilet seat scale thinks it's a good idea at least.