None. There are no sex or nudity shown in this movie. In one scene a virgin young girl puts her hands under a quilt and begins to fingering the crotch herself. No nudity. Some sex oriented references.

A girl shows her bra for a bunch of boys. Then all the boys laugh at her. However no nudity shown, It's not meant to be sexual.

A girl puts an under-aged boys hand under her skirt. However nothing happens sexual as the boy take away his hand from a girl.