Perhaps because feet come into direct contact with the environment often, spend part of their time inside warm, moist shoes and don't get washed nearly as much as hands.

也许这是因为脚部经常与环境直接接触，总是躲在潮湿、温暖的鞋子里，且并不像洗手那样经常冲洗的缘故。

youdao

A water jet massage that one doesn"t get wet just like a water-bed, massage is performed by the warm jets of water; as if they were invisible hands."

利用水力做全身按摩，但并不会弄湿身体，感觉好像躺在床上，内置的水力头就好像无形的手在按摩。

youdao