She could be my roommate. I think the only necessary parts of the joke are…

!sharing a fridge!

having cell-phones

some level of appreciation for cosmology

maybe post-modern communication foibles, maybe that’s the synergy effect.

I think the gender part is pretty optional. This could happen to anyone who shares foodgathering inventory management.

I could see this being unintuitive to anyone who hasn’t had to hold up a full end of an adult relationship. Or industrial logistics, I guess.