Enter: The British Royal Family

I just needed to say that;)

Or many royal fams, for that matter. Btw, for an adult, I think Prince Harry's babe is pretty darn sexy, although not so impressed that he's marrying a divorcee. Still, she'll help wring the inbred gingerness out of his offspring. (I'm terrible, no need to tell me so.)

Oh yeah, I have no problem with familial love affairs that don't create social strife. When making babies comes into it, then there's a problem.

(Also, just for the sake of accuracy, uncle and niece have a rather small chance of inbred genetic issues in offspring, though higher than average of course).