These girls do experiment with goy (Hebrew for "non-Jewish") males, but only white ones and definitely not shvartzas (Yiddish derogatory word for blacks). They seem to have no preference for WASPs or Catholics - just who is going to be the most successful in case they do screw up and fall in love b/c he must at least be able to support her expensive tastes.
Why? B/c non-Jewish white guys tend to be much better looking than their Jewish male counterparts (caution: gross generalization, but the truth - just ask any JAP of their goy good-looking male dilemma) and since they always get what they want financially from their parents, they must get what they want in terms of men too. Plus, those Non-Jewish men aren't as big of push-overs as Jewish guys so they do represent a challenge since they won't put her with her crap - secretly, like all women but to a greater extent, the JAP loves to be treated poorly with intermittent good treatment b/c it shows that he does not need her.
Basically, the JAP is just the extreme example of all women's insecurities: emotionally needy, low self esteem and wants everything their way. JAP characteristics are carrying over to non-Jewish rich girls now too, mainly the daughters of the nouveau riche.
Emily: damnn, thats a jappy situation..
Joe: Dude, this girl Kathryn cummed all over my face last night.
Vince: That's jappy mann.