The `Red Riding Hood` actress admits she has a "sick" sense of humour and is rarely shocked by rude gags.
She said: "I think it comes from the morbid sense of humour my sister has. I love sick jokes. I can`t tell you, but what I will say is that nothing shocks me. Really nothing. Gross things make me laugh like a 12-year-old. Penisjokes make me laugh."
However, Amanda admits she hasn`t always been so flippant and easygoing about sex and rude jokes because she had quite a conservative childhood.
The 25-year-old blonde told Marie Claire magazine: "Sex was meant to be a scary thing. Because of AIDS and pregnancy, we were constantly taught to stay away from it. Schools, videos, abstinence - It was just made out to be this very scary thing. My parents aren`t very religious anyway, so that wasn`t part of it. I think it was just the society where I grew up which made me look at it wrong. Also there were a lot of girls who got pregnant at school so that was terrifying."