Zitat:Quelle: Stephen LaBerge, EXPLORING THE WORLD OF LUCID DREAMING:

One of the most dramatic demonstrations of the cor­respondence between physiology and dream activity came from studies of lucid dream sex. In 1983 we undertook a pilot study to determine the extent to which subjectively experienced sexual activity during REM lucid dreaming would be reflected in physiological responses.

Since women report more orgasms in dreams than men do, we began with a female subject. We recorded many different aspects of her physiology that would normally be affected by sexual arousal, including respiration, heart rate, vaginal muscle tone, and vaginal pulse amplitude. The experiment called for her to make specific eye move­ment signals at the following points: when she realized she was dreaming, when she began sexual activity (in the dream), and when she experienced orgasm.

She reported a lucid dream in which she carried out the experimental task exactly as agreed upon. Our analysis revealed significant correspondences between the dream activities she reported and all but one of the phys­iological measures. During the fifteen-second section of her physiological record which she signaled as the mo­ment of orgasm, her vaginal muscle activity, vaginal pulse amplitude, and respiration rate reached their high­est values of the night, and they also were considerably elevated in comparison to the rest of the REM period. Contrary to expectation, heart rate increased only slightly.

Since then, we have carried out similar experiments with two male lucid dreamers. In both cases, respiration showed striking increases in rate. Again, there were no significant elevations of the heart rate. Interestingly, al­though both oneironauts reported vividly realistic or­gasms in their lucid dreams, neither actually ejaculated, in contrast to the “wet dreams” commonly experienced by adolescent males, which frequently are not associated with erotic dreams.