1987 Belgian short film Point de Fuite

'A new teacher comes to class to teach a lesson on a complicated math theorem. The class is waiting completely nude and catches her off guard. She takes off her clothes before the beginning of her lesson. During the lesson, the students put their clothes back on and take away her clothes, as she is concentrated solely on the theorem. Upon finishing, she is embarrassed that they are clothed and she is left naked, but there is now someone at the door. The class ask the unknown person to come in, and they find a naked teacher but clothed students. Inspired by mathematical rhetoric.'

There are excerpts from this film all over GBT but this is the full film - it is meant to be comedy/satire thus the title which means vanishing point and refers to the mathematical problem and...do I really need to explain? Aclever little film which has much more to offer then nudity if you give it a chance.