Well, Kory would make sense for the flip side of the same reason - she is Amazon. She's this passionate, fierce, incredibly feminine warrior who wears her heart on her sleeve and loves openly, wholeheartedly and unreservedly in a way that Donna wouldn't find elsewhere in Man's World. (Even Diana, over time, has lost it; she's far more stoic and reserved now than she was when she first left the island.) So while Donna's busy being attracted to the exoticism of all these silly, fun, crude, innocent, wildly diverse and imperfect boys, she also probably can't help but be drawn on a different level to someone so familiar, so much like what she grew up thinking of as ideal - and who is a sort of refuge when all the other differences get to be too much. It's the immediate, exploratory allure of the new versus the slow, dependable comfort of the known.