Does this work?

Brilliant more like it.

Pavlov's Bic

I love this!

It should work. We can train ourselves to do anything really, as long as she did it consistently and for a long duration of time her brain would associate that click with feelings of happiness, in turn releasing serotonin and dopamine. Pretty smart if it works. Pit fall is she would have to continue doing this for a lengthly about of time because if she stopped or there were gaps then the association would be lost.