main scene of this movie goes something like this
a boy and a girl who is wearing black stocking have sex in a room and while they don't know a hidden camera captures their photos and by the way,they have this scene in a room which seems to be a technical room since a PHOTOCOPY MACHINE and some other instruments are there

another scene is this:in a party people dancing tango with each other,while a man and woman have hidden themselves in a room behind a curtain or veil and having sex and sometimes their noise comes out and other people hear it!!!!!

anyone knows an erotic movie with these scenens please let me know