Living under the same roof, how long its not the common-in-law

That is the lawful idea. But really living in the same house, you saying he drink the tape water (in Chinese, you make the guys living like that) 

You are not sure how to pick up a "which knife".

You are not sure how to open a kitchen lower cabin trash can under the sink.

You are not sure how to tear a trash bag from a roll.

You are not sure how to pull one of those trash what bag from white, not black.

You are not sure the plastic zip bag from where he taller? 

You are not sure how to turn on the water facet, all the way up, or all the way right, or left.