Why do we lie?

She: "Illusions are lies, or lies are illusions?",

He: "Illusions are not real. So, they lie.
We lie, when we can't face the real, we are afraid of the truth. So we create illusions, to make things a bit easy."

She: "Why did YOU lie? Were YOU afraid of facing the real or because YOU did not trust ME and my truth.."
photo source https://www.pinterest.com/pin/491525746809274625/