Alright, I saw Oh, Canada and I have nudity to report:
We see a shot that's about 30 seconds long of Jacob fucking. There is a bed sheet covering his ass that falls down the longer the shot goes on. Unfortunately it was in black and white, but it's still pretty hot- the way his ass is positioned to the camera.
The film was coming to an end and I was getting worried that the jockstrap scene had been cut. It's one of the very last scenes. Also black and white. We see Jacob from behind in a few wide shots that last quite a while. We get an extreme close up of the front of the jockstrap. It's too bad there was no closeup of the back. But it's still hot as fuck.