A new study reveals why some couples in long-term relationships have more sex than others. The study, conducted at the University of Toronto, found that couples who were motivated to meet each other’s sexual needs, rather than their own, kept their sex lives from deteriorating. Those who have sex because it’s important to their partners and their relationships sustain their sexual desire, while couples less motivated by each other’s needs do not. Researchers studied 44 long-term couples for 21 days and followed up four months later. All participants reported having sex once a week. After four months, those motivated by each other’s desire continued to have regular sex while those who weren’t had less sex.

Read the full article here: Having More Sex in Long-Term Relationships Can Be Relatively Simple, Study Finds