I tried looking up more information about this:

https://psychology.wikia.org/wiki/Mommy_and_I_are_one

"According to studies that determine the subconscious mind's ability to absorb subliminal messages, the subliminal phrase "Mommy and I are one" is considered the most effective subliminal message to aid in self motivation."

How do you test if a subliminal message is effective?

This part is interesting:

In a game of darts, researchers found the the phrase "It's OK to beat dad" improved scores.