I'm trying to keep this simple. I'm just trying to think of the word "why" during a dream. Just that one word. And not necessarily in question form.

I'm thinking of "why" as like a seed to plant in the mind from which greater understanding will grow.

For example, say I'm dreaming I'm at a birthday party and I randomly think "why". What would I think after this?

Increasing the number of dreams with any type of reasoning would be progress towards lucidity.