PERRAS (2011): A Mexican Schoolgirl's Sex with Senator "Every Possible Way"

Here's IMDb's plot summary for Perras (2011) [English: Bitches]:

Ten girls are suspected of committing a horrible crime, and until they confess, they won't be able to leave their school.

While the schoolgirls waited, in between frolicking and raunchy lipstick lesbian behavior, they shared personal stories.

Seventeen-year-old Patricia shared that she was expelled from Regio, her previous "fancy" school, after her mother examined a picture of Patricia with a senator's "thing" in her mouth.

Patricia described the senator as "cute", "good looking", with "plump lips", "a tiny nose" and a "tight butt". The senator had a reputation for raping girls from fancy schools, but Patricia confessed, "We weren't scared. Actually, we all prayed for him to look at us."

The first time the senator delayed Patricia, he unzipped his pants and Patricia boasted "I knew what he wanted." And two weeks later, after he ordered her to remove her schoolgirl uniform, she bragged, "I fucked him in every possible way."

Perras was originally a 2008 play that was written by Guillermo Ríos - the film's director. The film premiered two years later in Mexico City.

LA LUCHA CON LA PANTERA (1975): Sexualized Mexican Schoolgirls Desire Men

Here's the translation of the plot summary posted on IMDB for La Lucha Con La Pantera (1975):

Life in the 1970s was not easy. And three examples will stand out as cruel glimpses into the wasted life of youth. Three young girls whose lives seem to be forgotten: 

Ana (Mildred Macías), one of them, has suicidal tendencies; 

Mercedes (Marissa Makendosky ), the second, experiences an incestuous attraction for her brother Guillermo (Enrique Novi); and, the third, 

Patricia (Rocío Brambila) longs to be sexually abused, as she reads in her fotonovelas. 

To elaborate, Ana stalks her literature profesor, which leads to kino on a public bench.

Much like in non-fiction, Ana, the coed, initiated the affair, but the teacher didn't have enough self-control to repel the nymphet's advances. 

Similar to the nymphet fantasies spelled out in Nancy Friday's My Secret Garden: Women’s Sexual Fantasies, Mercedes stalks her brother, which leads to a passionate incestuous kiss. 

And Patricia's desire to be sexually abused leads to autoerotism. 

In addition to the (middle) schoolgirl teleiophilia, the fact that the nymphets appeared to be Mexicans of European descent was striking. 

La Lucha Con La Pantera (1975) was directed by Alberto Bojórquez Patron and adapted from a novellas by José de la Colina.