First of all, he's going to be taller than me.
Secondly, when we were at the kitchen and then playfully chased him upwards in our own quirky way, he stopped and told me not to forget to turn off the kitchen lights.
I always feel belittled when he says that so I ask him why.
He tells me it's to save electricity. I ask him what about the small living room light. He says it's no big deal. I say it still wastes electricity, and if it bothers him so much, he can turn it off. He says he didn't light it on, so I replied myself again. He told me "ok I'm not arguing with you" and went upstairs.

He tells me that because I had times where I'd forget to turn off the lights in one of our house's rooms.