A study conducted at the Australian National University , published in early , showed that penis size influences a man's sex appeal, and the taller the man, the bigger the effect. According to Aaron Spitz, a urologist , many websites and studies promoting variation of penis size between races use unscientific methods of collecting information and often ignore contradictory evidence. Archived from the original on 3 March In fact, the penis of the common chimpanzee is no shorter than in humans, averaging Archived from the original on 26 April Standard Practice in Sexual Medicine.
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