" and give a clear warning that if the lie then they could be arrested "
Yet another way to criminalise the young for being hormone ridden curious teenagers. If our society's attitude to nudity and sex was less prudish and prurient - then the kids would grow up with a better understanding of such things. My Finnish girlfriends in the 1970s certainly had apparently benefited from their social practices and school education in such matters. On visits to England one would regularly roll her eyes and say "Typical English!".