I present the theory of Chudinger's Modern Women:

Inside a dark, messy, sealed room resides a foid -- your girlfriend. You don’t know what she’s doing inside; maybe using TikTok, maybe texting “a friend," or maybe practicing yoga with her trainer BGC Greek Anon who “has a girlfriend too, so stop freaking out!"

You, the boyfriend, are standing outside this room. You are ordered not to open the door, text her, or ask anything. Because doing so will collapse the quantum state that is your situationship.

So, before opening that door, your girlfriend exists in a superposition of loyalty and betrayal:

>Both faithful and unfaithful at the same time.
>Both menstruating and pms'ing