Why the Movie Nerve is Rated PG-13?

The MPAA rated Nerve PG-13 for material involving “dangerous and risky behavior, some sexual content, language, drug content, drinking and nudity – all involving teens.”

The movie, Nerve, begins with peer pressure. Vee, played by Emma Roberts, is pressured into playing an online game of ‘truth of dare, minus the truth’. She engages in the dare app and receives her first dare to kiss a stranger for five seconds. This can be considered dangerous and risky behavior. The trailer also shows brief nudity when Vee and Ian, played by Dave Franco, escape a store in the undergarments.

The trailer also contains potential violence and some sexual content, but the PG-13 rating seems to fair. Based off the trailer, what do you think the rating should have been?