Questions regarding that need or justification for snooping are plentiful. Excusing away inappropriate behavior and obsessive thinking is a national pass time. I places the investigator in a superior posture with the other in a subservient position. Citing fidelity concerns or health and safety issue are the smoke screen for the dominance of one spouse over the other.
Attorneys, law enforcement, doctors, therapists, priests, professors, board members, CEO's protective servic workers, etc. can't discuss their cases or work in detail with their spouses as it violate the tenants of their professions. It would be unethical, illegal and immoral to do so. What is more it is unnecessary and unreasonable to maintain such an expectation. Such privacy issues do present certain stressor and can strain the marital relationship if partners are only a half of the whole. Similarly in the personal arena, the confidence of a trusted friend or extended family, should not be betrayed in some fained attempt to appease one's spouse. Such an overture would be misplaced loyalty and again unethical.