
Penny's EMOTIONAL responses originate in the
primitive portion of brain, the amygdala.
The Big Bang Theory Season 1, Episode 17

You got EMOTIONAL
when that lab monkey died.
The Big Bang Theory Season 9, Episode 19

Her missing you,
is an EMOTIONAL state you find desirable.
The Big Bang Theory Season 2, Episode 23

Let's go over our EMOTIONAL responses
one last time.
The Big Bang Theory Season 6, Episode 20

Of course, yeah. Emotional chafing.
The Big Bang Theory Season 1, Episode 3