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10 Super Common Reasons Couples in Long Term Relationships Break Up

Cosmopolitan Logo By Laura Beck of Cosmopolitan | Slide 2 of 11: Couple lying back to back in bed while being angry at each other.

1. No sex

Or not enough sex. Sex is important. Finito. End of conversation. You want to make it past the 20 year mark, you better have that bedroom stuff on lock.

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