You add them using their phone number. You can give them a name just so you know who's on your list but the system won't actually have their name. As of now, if me and you have a mutual partner, that partner doesn't have to be a member, but the two of us would have to add the person to our lists. International is important: Im sometimes one of those people. Luckily we end up connecting on Facebook or IG. For now I'll be starting with the US to get my feet wet. If theres interest then I will proceed. People sleep with strangers, some people are poly, regardless of the reason, its a way to keep track of who and when, and if needed, to also alert them.
Whats your second reaction? LOL