Last Day

I've forgotten the name/artist of the film that I would like to talk about, but it was the one based on the filmmaker's experiences starting out as a filmmaker. I found it very intriguing and mysterious, mostly because I didn't quite understand it. In the scene where the young woman is complaining about always having to be naked and then calls him and tells him she wasn't going to continue doing the film, it was obvious how that could relate to what a filmmaker must go through. I wondered if maybe he had two actors who were doing "love scenes" together really doing them off set also, from the stained glass window part. One part that really interested me was the scene where he takes a shower, clearly distressed. Perhaps he was channeling a moment of frustration he had once, that happened to be in a shower.
I thought the film was successful, but it was very personal -clearly done in way that only the filmmaker himself could totally understand. One question that pops into my head is why was the movie so sexual? I would like to know how that ties into his memories of starting out as a filmmaker.