For those who grew up with the PSP, the tactile feel of the plastic, the click of the D-pad, and the whir of the UMD drive are powerful subconscious anchors. Using the device for hypnosis taps into the relaxed state you felt as a teenager gaming in your bedroom.
Scouring old Reddit threads (r/PSP) and GBAtemp forums yields interesting anecdotes about Hypnotism 2: Hypnotism 2 Psp