Everything you all responded with is why to disclose.
You can't possibly condemn another person to unwittingly going through all of this pain and loss of identity without losing your own dignity and self respect in the process. And, without disclosure, you would be intentionally taking away another person's right to consent.
Play it up however you want, that's what we are talking about here.
Getting consent, or not.
Can you choose not to get consent?
Is it wrong to have sex with someone without consent each and every time?
Yes. It is necessary every time.
Is witholding the truth to avoid getting a 'no' answer when asking for consent still consent?
No. You must give a sexual partner 100% of the information you know that could effect their health and well being. Not telling them something that would change their answer about consent is the same as forcing yourself on them physically. In both cases, you would be forcing them to do something they didn't want to do.
So, don't misconstrue the issue. It's not 'not telling', it's avoiding getting consent to take advantage of another person and to cause them pain and misery.
Call it like it is.
I agree 110%