I don’t agree with you. The display was designed to be censored and the couples that agreed to take part did not supply permission for the producers of the display to show any film or video of them fully naked.
There are many scenes in which you see the backs of the participants completely bare, however, there may be no complete-frontal nudity.
If your quest is to peer human beings bare within the wild, some National Geographic documentaries show primitive tribes in Africa and South America who, due to the new air temperature, wear very little garb. Full frontal nudity of each gender native is proven.
You can search for these movies online - YouTube has numerous - and they'll also be to be had at your nearby library as those are academic and now not taken into consideration pornographic.