The 'Bel Ami' actor recently visited Berlin, Germany, and was taken with the city's notorious sex joint, the KitKatClub, and when he told his father about it, he suggested they visited it together.
He said: "I was telling my dad about it last night and he sounded really into it. 'I'm coming over - let's go to the orgy club.' "
Robert - who is currently dating his 'Twilight Saga' co-star Kristen Stewart - is close to his family and says they help him cope with the pressures of fame.
He told Culture magazine: "I do everything to hide because, if someone finds out where I am, there are people outside 24 hours a day. And that's what drives you crazy, because you can't escape. It makes you not want top go out - then you don't meet anyone and just get insanely bored.
"My family think I'm insane. They are the only people I really let rip on - 'I'm going to kill myself!' My family all think I hate my job so much, but it's just the boredom that gets to you."