Stomach sleeping and erotic dreaming

This article describes research showing that in people who slept more on the their stomach, reported dream content that was more sexual in nature, including being tied and locked up. Dreams were also more likely to be about being persecuted in stomach sleepers. The researchers speculated that sleeping on your stomach may deprive your brain temporarily of oxygen which could result in the type of dream content reported by the subjects. I'm not sure about the decreased oxygen levels with sleeping on your stomach. However, it could be that some patients inadvertently bury their face in the pillow which could been be misinterpreted by their sleeping brain as being tied up or locked up. Also, I am not convinced you can control the content of your dream by the position that you sleep in. It may be better just to sleep in a position that is most comfortable.