I forget what the name of it was, but it was some 70's movie about life in prison that we had to watch during high school- and yes, the subject of man on man rape was touched upon. Luckily it was taped off of Fox (back when it was just mostly syndicated stuff before it became a network) so we didn't have to watch anything too graphic.
Grade school? Secret of Nimh. There, I said it, I never liked that movie.