Most Helpful Guys
I think one ought to tell their partner about everything from their past that their partner explicitly asks them about. One should also offer any information they weren't asked about, but feel is important for their partner to know.
In other words, I think it's only morally justified to withold information that both
A) your partner hasn't asked about
B) you deem insignificant
There is no onus on you to share your entire life with your partner, it's your choice. They didn't own the part before they met you. I would argue that you should disclose anything which directly affects their interests in the relationship, like if you were once a male or you are a convicted murderer. Other than that, if it was before they came along and it has no bearing on your relationship then it's yours and yours alone. If you choose to share then it's a gift, not a requirement.
Most Helpful Girls
Maybe not right away but I think they should eventually trust each other enough to share even the most painful and embarrassing things with each other
Yes. My SO knows each and everything about me, cauz we gonna stay together till we die.