Email is one of the few private spaces left in this hyper-sharing age. Sam Biddle at Gizmodo says, “This isn’t about having something to hide — it’s about keeping meaningful boundaries in an era when there are verrrrry few. We all need whatever scraps of privacy we have left, and your email is just that.”
Trust is an important bedrock for any relationship, but this isn’t trust. This is mutually assured trust destruction. Intimacy comes from sharing select private information with people, not giving them keys to your privacy kingdom.
When you share your password with someone, you open yourself up to the obvious downsides suggested by the Times. But you’re not just violating your own privacy, you’re violating that of everyone you correspond with. People send an email to your account assuming you’re the only one who will see it. They realize there’s a risk you might share the news with significant others, friends, family, or a random stranger on the bus, but there’s a reasonable assumption that you don’t have someone else reading your email.
–Kashmir Hill, Why Sharing Passwords With Your Girlfriend/Boyfriend Is A Spectacularly Bad Idea, Forbes