Clean up your look. When it comes to hair, women are most attracted to classic cuts, according to a recent survey by research firm Opinion Research Corporation.

In the study of 500 women, two out of three found the side part (think: Leonardo DiCaprio) to be the best-looking style, and 28 percent voted for the crew cut. Contemporary dos like short and spiked only scored well with 5 percent of the ladies.

Want to change up your look? Tell your hairdresser you want the classic square crop men’s cut, says Aveda Global Artistic Director of Styling Allen Ruiz. “It’ll give you a more polished look.” (Picture a more modern take on Don Draper’s classic style from Mad Men.)