Betrayal by someone close to you is truly devastating, as it inevitably means one or both parties are at fault.
When a man seeks a lover, the initial enthusiasm is almost guaranteed to be intense, much more palatable than the snorting wife at home. However, the most common risk is the disastrous after the passion cools, when expectations align—a situation that can lead to the most horrific dramas.
Finding a partner is similar; you must be fair and choose your partner carefully.