Careena Collins' Twins (1986)

Ok, it's the 80s people! We've got big hair, big cocks, and real tits! This movie takes place during a mix-up between two twins. One goes around the school and fucks her professor, and then he accident thinks it was the other sister. These twins stir up a mix of problems in this plot driven porn. There are a lot of different sex scenes, but you have to watch the full movie straight through to understand what is going on!