I just stared at my child, who actually asked me that question.
"I know. Pathetic, going to your mom for lying tips."
"Well, yes, but what on earth made you think I would teach you?"
A sly grin.
Then, "I think I forgot how to lie. I don't think I'd forget how to murder, but I forgot how to lie." She caught me staring at her. "Not that I would ever murder."
Two guesses for which child I'm having this conversation with.