雄性对醒目的性特征很痴迷,看来这非常普遍。对同种雌性具有吸引力的雄性特征,比如鹿角或孔雀的羽屏,会随着身体的生长而大得与身体不成比例。随着某一物种个体的长大,其大多数身体器官都按比例生长,但是人们早就知道,生殖能力的外在标志却是一个特例。在迄今最大规模的调查中, Males are obsessed with eye-catching features and it seems very common. Male traits that are attractive to the same species of female, such as antlers or peacock feathers, grow disproportionately to the body as the body grows. With the growth of an individual species, most of its body organs grow in proportion, but people have long known that the external sign of reproductive ability is a special case. In the largest survey to date,