The abstract for a study conducted by three French researchers and published in the journal Psychology of Music has a rather dry way of putting it:
Men’s music ability and attractiveness to women in a real-life courtship context
This experiment tested the assumption that music plays a role in sexual selection. Three hundred young women were solicited in the street for their phone number by a young male confederate who held either a guitar case or a sports bag in his hands or had no bag at all. Results showed that holding a guitar case was associated with greater compliance to the request, thus suggesting that musical practice is associated with sexual selection.
Simply put: Ladies love musicians! I could’ve told you that, and the Globe and Mail explains the study in more detail.