Yep, I saw A History of Violence as well as Serenity this weekend. Found this at CBR News. Haven't really seen to much of Cronenbergs stuff, but this info may shed some light on how into is job he really is.

A HISTORY OF VIOLENCE

This one was so strange, we had to run it near the top. Faithful reader Hector Lima pointed out this tidbit over at Contact Music, so strange we can only quote it: "Eccentric film-maker David Cronenberg shocked his cast and crew on the set of new movie 'A History Of Violence,' by publicly performing sex scenes with his wife. The director hoped his explicit displays of affection with his wife would help stars Viggo Mortensen and Maria Bello, who play man and wife in the film, feel more comfortable during their sex scenes together. But, instead, the Cronenbergs just left everyone on the set stunned ... Mortensen says, 'There's a couple of fairly racy sex scenes in the movie ... between Maria Bello and myself. David, trying to be helpful, as usual, thought it might be a good idea to call up his wife and have her come down to the set. The crew and Maria and I just sat and watched while he and his wife got into something comfortable -- nothing -- and they started to say, 'We want you to (do this).' Maria and I were both going, 'OK, we get it.' This is a testament to their relationship, they kept going and they kept going and then we broke for lunch and some time in the evening Maria and I got to have a crack at it. Instead of putting us at ease, we actually were kind of freaked out... Maybe some things ought to stay private.'"