For all their sexual indirection, those films portrayed sex as liberating but volatile and something to be handled with care.

In the same era, the studios began to flout their own archaic Production Code, which decreed in straitjacketing detail how to portray sex and violence.

While the US film portrayed sex as something to be enjoyed by both men and women, in Mukai's film, it is for the man to enjoy at the woman's expense.

If an internationally acknowledged director like Ingmar Bergman could portray sex in such an explicit way, the last border had been crossed.

This attitude is fuelled by modern culture which portrays sex as an activity for the young and physically desirable.

He also cited as inspiration specific Japanese cartoonists who he felt had successfully portrayed sex in animation such as Monkey Punch, the creator of Lupin III.

It proved difficult to portray sex as convincingly scary, which caused the producers to introduce the concept of "people like the Amish who are from another planet".

Instead, Ginsberg portrayed casual sex, and used this to comment on the emptiness and constant hunger that could exist in the lives of Americans.

Wired.com writer Regina Lynn claims that the site portrays sex more realistically than most pornography.

Apparently those disks portraying anal sex were the most expensive to purchase, and paid the prostitute who cashed it in (at the local barracks) the most.