This is one of those double standards that just won't die.
The radio show I listen to in the morning is definitely aimed at a male audience.
Made up of five male cast members. They are outraged by male teachers sleeping with their female students, regularly express their outrage and revenge they would exact as a father when topic comes up in the news.
But as soon as it is boy with a female teacher whole nother ballgame. They want to see a picture of her. If she is hot no harm no foul. If she is a beast (their term not mine) than maybe that isn't cool. Probably still not harmful to the boy in their eyes, but doesn't come with the cool factor of doing a hot teacher if your friends find out. They have no problem stating it over and over everytime the topic comes up. Almost all of them are fathers with young boys. Always shocks me that no one calls in and complains, but they don't.
If the genders were reversed and they even made an innuendo that the thirteen year old girl was hot and they could see how the male teacher ended up in this mess the roof would come in, sponsors would be pulling their ads.
I would venture to guess that Sandlers production company financed the movie and it will probably do quite well.... I haven't watched the preview, but if the teacher is hot I don't think you will see a lot of outrage.