User blog comment:AntiGravityMaster/Pacifica's Parents Are Evil!/@comment-27159736-20150701173453

Preston removed all of Pacificas willpower by using that bell to remind her of what happens if she steps out of line but it could either be due to domestic violence or that she's been raised that way.

We have been infected by Pavlovian Conditioning by constantly using our phones. it became instinct for us to check it even if it wasn't our phone that rang.

Historically wise Pavlov nether abused his dogs to react to sound it just became instinct and Pacifica was just raised by the sound of the bell so she know what to do if it rang.