Facebook says men are the older partner in heterosexual relationships 67% of the time while woman are older in 13%.

As people get older, the age gap in their relationships grows, says Facebook. This is because the younger people are, the more likely it is they met in school.

Egypt has the highest age difference, according to Facebook data — men are 5.09 years older than their female partners on average. Scandinavian countries have the most same-age relationships.