I was doing some research about how THC effects sex and etc and came across some awesome history of Marijuana and Sex ^_^ 

Marijuana and Sex: A Classic Combination: By Terry Necco

"Ancient tantrists and modern researchers agree: pot and sex are two great things that go together"                                                                                                                                                                                                                                                         "Marijuana and sex are gifts of nature. We enjoy them because biology and evolution have equipped us to do so. Just as our bodies contain pleasure systems which reward us for sex; our brains contain neurocellular circuitry which can only be activated by substances with THC's molecular structure. This makes the marijuana high a unique constellation of feelings, and there are only two sources for the substances which activate THC's very own neuroreceptor. Our brain is one source: it generates a neurochemical very similar to THC, called anandamide.

Translated, the word means bliss. The only other source for this bliss-producing substance is the cannabis plant."

        "Being stoned or sexually aroused both produce similar physiological responses, such as increased heart rate, heightened sensitivity, changes in blood flow and respiration, relaxation ? an acutely altered state of consciousness. Neurochemistry, hormonal systems, and brain regions such as the temporal lobe are affected by both marijuana and sexual arousal."

"Sex and pot provide us with euphoric peak experiences, unity of body and mind, a healing escape from routine existence. If other people are involved with us in sexual activity or marijuana use, such experiences can be especially intimate and revelatory, facilitating trusting, loving relationships."

        "Marijuana has been used as an aphrodisiac for thousands of years, yet ironically it has also been used to decrease sexual desire. Ancient sacred texts reveal how to use marijuana to increase sexual pleasure, but modern research teaches an equally important lesson: marijuana's effects are determined by the personality, physiology, intention, environment, and culture of the user."

           There are also history in the website that I found this awesome infomation talking about ancient India, Tantra, bhang, and more on how they would use the Goddess flower of love <3                                                                                                                                                                                                                http://www.cannabisculture.com/articles/1372.html