New Delhi : Tobacco companies put a lot of effort into giving cigarettes sex appeal, but the more sensual smoke might actually belong to marijuana.

Some users have said pot is a natural aphrodisiac, despite scientific literature turning up mixed results on the subject.

The researchers pulled together data from roughly 50,000 people who participated in an annual Centers for Disease Control and Prevention survey during various years between 2002 and 2015. “We reported how often they smoke — monthly, weekly or daily — and how many times they’ve had sex in the last month,” says Dr. Michael Eisenberg, a urologist at Stanford University Medical Center and the senior author on the study. “What we found was compared to never-users, those who reported daily use had about 20 percent more sex. So over the course of a year, they’re having sex maybe 20 more times.”

Another study published in 2012 found that women became more aroused when watching erotic films when they had cannabinoids in their system. But that might just be because weed seems to heighten sensory experiences overall. “It gets people to appreciate the moment more anyway,” psychologist Earleywine says. “They like food more, find humor in things more easily, so it wouldn’t be stunning to think they would enjoy sex more.”

Not everyone agrees with that conclusion. “It’s a lot of stretch here,” says Dr. Rany Shamloul, a researcher at Ottawa Hospital in Canada who focuses on sexual health and function. He didn’t work on the latest study. In an odd Catch-22, Shamloul says that recent research suggests cannabis might actually make it harder for a man’s penis to become erect, even if weed might turn people on.

“Recent studies have shown cannabinoid receptors in the penis itself, and experiments in the lab show an inhibitory response,” he says. “There was basically a mixed result. Cannabis might increase [sexual arousal] frequency in the brain, but also decrease erectile function in the penis.”

Stanford’s Eisenberg says his study doesn’t prove the idea that marijuana is getting people into the sack, though he says that is a possibility. There’s really only one conclusion he can safely draw from the work: Cannabis users are doing it more.