Be it peacock feathers or butterfly wings, we can thank hard market competition for the animal kingdom’s brilliant variety of colours and patterns.
Females are picky – they invest time and energy producing offspring.
It is also a fitting promotion of a machine that the 1929 book Middletown: A Study in Modern American Culture says encouraged pairing among high-school students in lieu of group excursions and that has generally abetted sexual liberation since the days of the Duryea.
The authors say that "another problem, much discussed by Middletown parents, [is] the increasing relaxation of some of the traditional prohibitions upon the approaches of boys and girls to each other's persons.
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Take actions like offering compliments, or telling a joke, Go on activities like mini golf or a dinner date.
Males make a less risky investment in sperm, compete with each other for access to females and have to prove they’re worth her time.