While we love make-up, logic might dictate that the more a woman wears, the less trustworthy she seems, since make-up is inherently…well, stretching the truth.

But as it turns out, the link between make-up and trustworthiness is a bit of a mixed bag. According to a study from researchers at Harvard and — coincidentally — cosmetics company Proctor and Gamble, when participants were shown images of women with varying degrees of make-up in rapid succession, they found those who were more heavily painted to be more attractive, competent and trustworthy.

When they were given more time to examine the images, though, while they still rated the heavily made-up women as more likeable and attractive, they also rated them as less trustworthy.

The study was featured on “Good Morning America,” and according to the show’s website:

“In situations where a perceiver is under a high cognitive load or under time pressure, he or she is more likely to rely on such automatic judgments for decision-making,” the authors wrote. “Facial images appear on ballots, job applications, web sites and dating sites.”

So there you have it. Speed dating, or planning to inconspicuously pass by the workplace of the person you’re secretly in love with? Coat yourself with cosmetics. Going for a dinner date? Less is more.