Ample anecdotal evidence has shown us that cannabis and coitus go hand-in-hand, but now we have the medical research to back it up.

In a new study published in the Journal of Sexual Medicine, researchers from Stanford University School of Medicine revealed that people who frequently consume cannabis have roughly 20 percent more sex than non-users.

The researchers conducted a retrospective analysis of data on 50,000 Americans between the ages of 25 and 45 compiled by the National Survey of Family Growth between 2002 and 2015.

Survey participants were quizzed on how often they engaged in heterosexual intercourse over the last month, as well as how frequently they consumed cannabis in the last year.

Women who consumed cannabis every day had sex an average of 7.1 times during the previous four weeks, while women who hadn’t used cannabis in a year had sex an average of 6.0 times in the previous month. Among men, daily cannabis users reported having sex an average of 6.9 times in the last four weeks, compared to 5.6 for non-users.

“In other words, pot users are having about 20 percent more sex than pot abstainers,” said senior author Dr. Michael Eisenberg, adding that the study shouldn’t be taken as having proven a causal association.

“It doesn’t say if you smoke more marijuana, you’ll have more sex,” he cautioned.

That said, research shows that the average couple has sex roughly once a week. That means that routine cannabis use could add up to 20 more sexual encounters per year, said Eisenberg.

“I think if you asked a man or a woman, 20 more times to have sex over a year, that would seem like a lot,” Eisenberg said.

Given that a record number of Americans now support recreational cannabis legalization, we can only assume there’s a whole of lot of cannabis-friendly copulation going on from coast to coast.

h/t Reuters