We have a duty to be respectful and truthful

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"Why did you let the relationship go? I'll bet it was because you felt that the person did not respect you. You may have enjoyed the same hobbies, had fun together or even shared a long history, but if you believed the other person did not respect you, there was no basis for a worthwhile relationship. The ethical principle of respect for others is a fundamental component to all relationships, personal as well as professional, and one of the most important ways we honor this principle is by telling the truth."

Ethic extending to Internet Dating