Think about the last lie you told. What was your motivation?
My motivation for my last lie, and all lies I tell is always pretty simple: is the truth going to be problematic- will it upset someone? Does it make the story I’m telling more amusing to stretch it a little? If so, then the decision is very clear. Sometimes I tell obvious lies, for comedic effect, which will be recognized immediately- these are always meant to make people laugh, and are never taken seriously to begin with. I do not tell lies that I think could potentially hurt someone, and I do not lie to people who I know will take me seriously, except to make them laugh.