Lying and Deception are also Necessary
Though our intimate relationships are designed to help people get ahead in life, they are far from easy to maintain and even in the most ideal of circumstances they present any number of challenges.
Inevitably, deception is necessary, even in the best of cases (see pros and cons of lying).
In fact, romantic relationships involve two special features which allow deception to flourish: abundant opportunity and the dire need to deceive.