Early in the relationship, guys may not even see the potential of a bi-girl hooking up with a girl as ‘cheating’, vs a bonus for his enjoyment.

Oh boy is that a land-mine I’ve stepped on.

A real, “wait I don’t understand what do you mean you’re in love with her?” moment that rang my bell back in my 20s. And then they ran off and got married. Which… hey, at some point how can you even be mad? They were clearly very happy together. Still sort of sucks to find out your axle was actually a third wheel.