Why do men cheat? Are they hard-wired to be unfaithful or do women drive them to it by pressuring them too quickly into committed relationships?

In this video, sex therapist, marriage counselor and YourTango Expert Melissa Fritchle explains that while there is a lot of pressure to commit in our society, the problem arises when monogamy is assumed instead of explicitly decided. "Relationship agreements are personal," says Melissa, and so every couple should consider and discuss what it means to them.

More from YourTango: What Do Men Find Sexiest In Women?

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