Hey babe! I dunno if I get ur question. Are u implying that in a threesome relationship you have more control over who ur partner is with?Whats the difference between only thinking someone's not cheating on you vs knowing he or she isn't?
If that's what u mean then I think that's a sad way to live. Kinda defeatist. "Imma let em cheat because they gon do it anyway" type of mentality.
Also even this illusion of control is wrong b/c they could still have sex behind ur back.
Cheating happens for many reasons. Not just the restriction of partners or b/c people just wanna fukk different people.
What if they make a connection with someone they don't run by you? What if they don't want u to know about the way somebody else makes them feel?
I know people with "open" relationships that still got betrayed or cheated on in these very same scenarios.
If u gon do a threesome do it because u want to experiment, not as a safeguard against betrayal because it's a flimsy one and you can still end up burned...sometimes even harder because u weren't expecting it.
I'd say people need to let go of fear of abandonment and betrayal when they get into a relationship because it seems like that's what's driving a lot of the experimentation.
If not then, be safe and have fun. No judgement zone here.