Every teenager is going to try and lie to their parents at one point or another. It's part of growing up. Some kids might put a lot of thought and preparation into their lie. Because of this, they might be a better liar than you.
It has been a long time since I have dated. I can't remember if I lied to my husband on our first date. I would like to think that I was very honest, but after knowing that 61% of people admit that they lie on the first date...it makes me question what I told him.