Coffee perks millions of Americans up each morning, and a new study finds it might help keep men’s sex lives percolating, too.

The study, from the University of Texas Health Science Center at Houston, found that men who consume more caffeine each day had a lower risk of erectile dysfunction. The exception? Men with diabetes — for them, extra caffeine didn’t lower their odds for impotence, the researchers said.

“Even though we saw a reduction in the prevalence of erectile dysfunction with men who were obese, overweight and hypertensive, that was not true of men with diabetes. Diabetes is one of the strongest risk factors for erectile dysfunction, so this was not surprising,” lead author Dr. David Lopez, assistant professor at UTHealth School of Public Health, said in a university news release.

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