Proximity and valence electrons.
The Big Bang Theory Season 2, Episode 13
So this will work on any host
in PROXIMITY to her.
Westworld Season 2, Episode 9
VIRTUAL ASSISTANT:
Proximity alert.
Westworld Season 3, Episode 8
...regarding prolonged physical PROXIMITY
to Amy Farrah Fowler.
The Big Bang Theory Season 4, Episode 5
in close PROXIMITY
to one another.
The Big Bang Theory Season 7, Episode 5