Sorry fellas, but she’s probably just being nice to you.

Many women know that men sometimes mistake friendliness—say, smiling and eye contact—for sexual interest. Psychological research has long backed up their experience. A new study appearing in the April issue of the journal Psychological Science is no exception. It found that college-age heterosexual men who viewed images of women misidentified their body language and facial expressions as sexually suggestive 12 percent of the time. Women made the same mistake only 8.7 percent of the time.

These findings are nothing new, but when the researchers ran the second part of the experiment a curious pattern emerged.