There's no question that smoking weed or drinking before you have sex has an effect on the, ahem, activities that follow. Surely this is something you've discussed among friends, but to give your next conversation about the nuances of sex under the influence a bit more weight, assistant professor Joseph Palamar and a team of researchers at New York University published an in-depth, qualitative study in the Archives of Sexual Behavior on how, exactly, marijuana and alcohol affect our bodies and sex lives