Sex on the beach--a really nice beach in some tropical fantasy land--is a beautiful thing. Arianna Sinn agrees. That's her philosophy. 'I like sex on the beach. I like the idea that I am doing it out in the open where anybody can see us. And it is so beautiful. The sand and the water..what is more perfect than having sex on the beach?' Sex on the beach with Arianna Sinn--that's more perfect. 'I love different positions,' says Miss Sinn. 'It depends on my mood, but I prefer doggie style. I love him to be more aggressive than me.