In my experience your suggestion that Psych students are all 'bent' or closely related to someone 'bent' ('bent' being a non-scientific catchall) is a truism. I posit that people are fractally complex (the closer you look at the behaviors and expressed thought processes of an individual, the more complexity you will find). I further propose that any sufficiently complex system will demonstrate 'bent' behaviors over even very short sampling periods.
In other words, finding a unbent psych student or one unaffected by bent people is like finding a meteorology student uninterested in or unaffected by weather. Of course, in the context of this conversation this cannot be proved except by induction, because it is difficult to sample twice the number of people on earth without waiting an inconveniently long time.