Posting from the perspective of someone who is in a physical relationship with someone who was born with HIV but has been undergoing treatment for the majority of their life and has been undetectable for many years now. I am a straight male and my partner is female.

We are in a new relationship and not yet exclusive, we are also considering an open relationship so the possibility of sleeping with other folks may always be available anyways.

I guess I'm wondering how to approach sleeping with new people. Will I have to tell them I have a partner who is HIV positive? Is it even my place to disclose my partner's status? If they are undetectable and we are using protection (we still always use a condom) is there any risk? My understanding is there is zero risk (even if we didn't use a condom).

I know in some states (we are in the US) there are laws around disclosing your HIV status with partners, but as far as I know there is nothing about disclosing a partner's status to other partners.

I know there may be some people out there who have a hardline stance about this and will say you ALWAYS have to disclose no matter what, but then I'd ask where do you draw the line? A partner's partner, a partner's partner's partner?