Jan. 13, 2006 -- Caffeine may put females in the mood for sex, a new study shows.

In the study, female rats that got their first shot of caffeine before mating were quicker than uncaffeinated females to scurry back to a male rat after sex.

The caffeinated females weren't just looking for company. "It looks as if they wanted to have sex again," researcher Fay Guarraci, PhD, tells WebMD.

Might caffeine also rev up women's sex lives? Maybe, but it's too early to say, says Guarraci, an assistant professor of psychology at Southwestern University in Georgetown, Texas.

The study, titled "Coffee, Tea, and Me," is due to appear in an upcoming issue of Pharmacology, Biochemistry, and Behavior.