Had to explain why the neighbors' hot tub situation isn't our business

So my 10-year-old comes home asking why the Hendersons are filling their hot tub in the backyard at 9pm. I guess he was being nosy looking over the fence. Had this whole conversation about privacy and minding our own business while internally wondering the same thing. Ended up being a surprisingly good teachable moment but man, kids ask the questions you don't want answered.