When you’re taking a walk with your chick, you’re likely to reduce your walking speed to match her pace. A new study found that men will lower their pace significantly when walking with a romantic partner but not with female or male friends. The men in the study reduced their walking speed by about 7% to match their romantic partner’s pace. It was also found that when male friends walk together, they tend to walk faster than when they walk alone. This suggests that walking speed is relative to social closeness, according to the study. This spells good news for women as it spares them from additional caloric expenditure that could lower fertility, say the authors.