Additionally, as anyone who has worked on set knows, any time there is nudity and/or a simulated sex scene, the set should be closed to minimum personnel needed. That number can vary - especially if there is dolly work, etc. but should never be more than needed. Additionally, "video village," where there is access to a monitor, should only be for those who need to be there during takes (lighting and art folk may need it during set-up).
Common sense - and common courtesy - are the basic rules.