Men have always been expected to love more in a relationship with women, and those expectations stem from a place where men have had a history of not being as emotionally vulnerable as women. This is untrue, as not all men are the same, and not all women are the same. This could also be said about a woman who moves on quickly, so she should be the more loving one. It all depends on the kind of person you're in a relationship with. Love can be expressed in different ways, so while one person says I love you more often, others could express love through acts of service.