My parents taught me as a child lying is harder than telling the truth. I am way too lazy to bother with anything other than using a tangent to change the subject. Simplicity also helps keep track of my life. I like understanding what is happening and why.
Skills involved in deception also teach problem-solving, project management, and social context management. My favorite friends were the brilliant liars. They always had a new entertaining story.
For a host of reasons, their theory goes, lying is more mentally taxing than telling the truth. Performing an extra task while lying or telling the truth should therefore affect the liars more. The Load of Lying: Testing for Truth
As evidenced by Dunbar’s Number, our brains are wired for both determining honesty in others and being the cheat.