Most American teenagers, 98%, reported lying to their parents in a recent study from Penn State, even though, depending on their ages, 96 to 98% say lying is morally wrong.
Of course, when asked to keep a diary, most adults admit to lying about once a day.
The reasons teenagers gave for lying to their parents included lies about where they spent their allowance, whether they started dating, what movie they went to (!!!), their alcohol and drug use, whether chaperones were at the party they just attended, and whether they rode in vehicles driven by drunken teenagers.