This sex scene looks downright stuffy, with our man still in his uniform shirt with all the buttons, and her with her big hat:

This looks a lot like the brothel-porn that used to come back from Japan and Okinawa shortly after World War II:

According to Forced Woman by way of Bondage Blog, this scene of a well-dressed woman tied in the woods for sex by a scruffy man with a sword is a nineteenth century shunga (Japanese woodblock print) by famous artist Kunisada, from his series: shunka shuto shiki no nagame (Spring, Summer, Autumn and Winter: Prospects for the Four Seasons):