What does "exotic" meant to guys? [inspired by the question below]

So in the question below this one, I saw that the question asker mentioned Megan Fox as exotic (she's just tan with really dark hair and nicely arched eyebrows but I see nothing exotic about her features). Do guys really see Megan Fox as exotic? What's exotic about her? I also noticed that guys mostly consider hispanics and asians exotic. Why not africans? I think africans are as exotic as hispanics and asians, if not more exotic. So, what are exotic characteristics according to guys?
What does "exotic" meant to guys? [inspired by the question below]
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