Oh wait, I answered wrong. When I was a 15 year old kid, I implicitly lied by going to an R rated movie without parental supervision. The next day, I shaved and bought a "child" ticket implicitly claiming that I was 12 or under. I also asked for and got a senior discount back in my mid-30's. I did that as a joke.
I'll just recharacterize my answer to be "Male - Never lied as an adult to make people think I was younger".