Does depth Phsycology involve a gerbil or a fist?
OMG - ROTFLMAO
In his case I believe it's a pineapple, or it should be
PhD in Depth Psychology...
Maybe he was joking. You know, Tongue-in-Cheek as it were. In his case, PhD might be a conflict in terms, i.e.
Piled Higher and Deeper...