I just read an article about how young American males feel uncomfortable appearing naked in front of each other in locker rooms. That was never the case when I was young. We were naked in the Army all the time. And neither actor in Call Me by Your Name appears fully naked. I think there might have been clauses in their contracts that ensured there would be no nudity. When I wrote the script, there was plenty of nudity. But the English just had none of the same squeamishness about it.