“Hello. I think you’re really pretty, and I was wondering if you would give me your phone number.” How would you respond to this request? If you’re a woman, your response may depend on the weather. French researchers found that undergraduate women responded more favorably to a male’s request for their phone number on sunny days compared to identical requests made on cloudy days. Importantly, the temperature and perceived attractiveness of the male did not influence phone number giving behavior. Is sunshine the hidden secret to women’s receptivity? Probably not. It’s more likely that anything that puts women in a positive mood will increase the likelihood of giving out their phone number.