It's easy to say, "If it was consensual then there shouldn't be anything wrong with it." However, there are laws, and because of this we sometimes have to resist our urges--sexual or not. Adults understand the law. Any 30+ guy who is trying to get at a girl under 18 has some serious issues of his own. But more importantly, in this case, he was an authority figure to these girls. Men in positions of power over young women have more influence on these young women. Teenage girls get crushes. Teenagers (kids) are more easily influenced, especially by those who have authority over them. It appears Ponce abused that authority and used it to fulfill his sick sexual desires.