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interesting. from evolution point of view, the value of eggs is much more than that of sperms. as a female (not just human), if pregnant, she or it needs weeks or month to take care of baby. even for invertebral, they need much more energe and take risks. (female mosquitos needs taking risk of life to suck blood). So this is why when female wants a mate, she or it will definetely try to guarantee quality of the source (owner of the sperms). for male, sperms is massive-produced; the more offspings they could have means more successful. so male, in nature, wants to have more partners to have more offspings.
An interesting example is a type of molliscus, which is bisexual, when meets each other, both of them want to be male to inject sperms into others; so who wins the fight will be the father of offspings.
When using these principals for human, who are animal as well, you would find why Arnold Schiwarzeneger or Tiger Woods still has affairs even their partners are either beautiful or capable, and why lots of women are willing to deal with them. |
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