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Or giraffes find long necks (and other body parts) very attractive.

• Smaug123 5y ago
  That is a glib answer which misses the point entirely. Why do they find long necks attractive? The answer to that sort of question usually turns out to be "because animals who randomly happened to be a little more attracted to long necks were more likely to breed with the long-necked animals, so their genes became better represented in the gene pool thanks to the long-necked animals' better survival power".
  • gpm 5y ago
    Why do peacocks (or really peahens) find giant feather displays attractive? I think the answer is usually actually "because it is indicative of a healthy mate". If you need to be well fed and healthy to grow tall, or to maintain a giant set of ridiculous feathers, then it will probably be an attractive trait a few generations later, since it will predict success.