My observation is that there are people who are attracted to situations which their logic should send them in another direction. Possibly, these folks also get some odd benefit from being in the situation (that most dont understand), or they are simply "wired" differently-much like folks who seek the "rush" from being exposed to extreme danger or chaos? Iwould not rule out some may be impacted by (learned behaviour) from youth. Added, may be the "missionary types" who seek out a "damaged" individual, in hopes of successful rehabilitation.