You don't need to insult others Jack.

If someone demanded to know all of my information upfront, before I was comfortable sharing it, then I would end that relationship ASAP. It shows a distrust of me and I don't deserve to be treated like that.

Does that mean that people who are otherwise s**theads will manage to be in relationships for a long time before their true colours show? Yes. That's how people end up in abusive relationships. But it doesn't give anyone the right to demand to know someone else's past information just because they have their own issues.

The OPs girlfriend's past doesn't have anything at all to cause the OP concern - she's never cheated on someone! Yes, she's been a bit more risque in some ways that the status quo, but she hasn't done a single thing wrong in her past and she has no reason to HAVE to share it with her bf.

And Jack... just because you've been lied to (as have many, many, many people on this board.... there are loads of survivors of abuse on here) doesn't mean that you know everything. Just as I don't know everything. Your opinion isn't more helpful or less helpful than others - although you are shading your advice based upon your own experiences moreso than the OPs post.