Young men who think they’ve got artificial stimulants in their cocktails take greater risks than those who think otherwise, so you more predatory casino operators out there should start slapping Starbucks logos on your bar glasses ASAP.

A new study published in the Journal of Consumer Psychology sought to determine why the consumption of alcoholic beverages mixed with energy drinks like Red Bull is associated with higher rates of car accidents, sexual assaults and other sketchy behavior. The study, conducted by researchers in Canada, France and the United States, is subtitled “Placebo Effects of Marketing Labels on Perceived Intoxication and Risky Attitudes and Behaviors.”

It worked like this: 154 heterosexual male social drinkers with similar body mass were given identical cocktails consisting of vodka, Red Bull and fruit juice. Some of the group’s drinks featured labels reading ‘Vodka cocktail,’ others read ‘Vodka-Red Bull cocktail’ while the final group’s drinks just said ‘Exotic fruits cocktail.’ But everyone understood there was hooch in their glass.

After a pause to allow the booze to kick in, the participants undertook a series of tasks on a computer, including viewing photos of young women, after which the men were asked whether they’d attempt to chat up each woman and what type of reaction the men expected from each woman.