•At lower doses, marijuana may enhance sex. People report that their awareness of touch is heightened, and their perception of time can change. So things "feel" better, and sex seems to go on longer as well.
•In another study, 75 percent of men said that marijuana increased sexual pleasure and satisfaction, 68 percent reported that it enhanced their orgasm, and 39 percent found that it increased the duration of intercourse.
The Bottom Line: While we don’t know why marijuana has positive effects on sexual satisfaction in men and women, research and anecdotal evidence consistently show that in small doses, there are perceived positive effects.
•In higher doses, marijuana can have a depressing effect, which can leave you without the energy to want sex, or the awareness of the way sex is feeling.
•Some research has found a relationship between long-term use of marijuana is associated with increased erectile dysfunction.
•Research has suggested that marijuana use is related to a reduction in testosterone. While this may raise some concerns, other researchers point out that the reduction seems reversible
Bottom Line: Using marijuana more regularly or habitually is related in men to increased risk of erectile dysfunction, and in men and women it may be linked to overall reduced interest in sex. Marijuana, in higher doses, has detrimental effects on fertility and even in smaller doses can have negative impacts during pregnancy for the fetus.