re: ZanyZander - Garrel was not in Y Mama Tu Tambien. That was Gael García Bernal (some resemblance) and Diego Luna. The film had a delightful amount of nudity (such as the two guys jerking off on side-by-side diving boards), but the peeks were kept "R" rated discreet (DAMN IT). I would note that Garrel has done other works in a career I would call unshy. But I am not enough of a fan and watch too few French movies to give a good list.
I think he is also in, "Y Tu Mama". He has a blow job done on him there and fucks in a hotel. Very briefly for those too. Worthwhile seeing though. They are a few seconds long. I'm confused because I thought people weren't supposed to be really having sex in R rated movies but I've always thought that they were at least statistically on some level. I think some people didn't know what they were talking about a few years back.
