Editing Sexual Selection and Behavior (section)

== <span style="color: #FFFFFF;">Understanding</span> ==
Sexual selection is understood through '''Cost''' and '''Choice'''.

'''1. The "Logic" of the Tail (The Handicap)''':
Why "Waste" energy on "Beauty"?
* (See Article 636). A **Peacock's Tail** makes it "Easier" for "Tigers" to "Catch" it.
* **Natural Selection** should "Eliminate" it.
* However, if **Females** "Prefer" the tail, the "Long-tailed Male" "Gets More Mates."
* His "Success in Mating" **"Outweighs"** his "Risk of Dying."
* The tail is a **"Certificate of Health"**: "I am so strong I can survive EVEN WITH this giant tail."
* "Beauty" is **"Advertised Fitness."**

'''2. The "Investment" Divide (Trivers)''':
Why are "Males" usually "Flashy" and "Females" "Choosy"?
* A **Female** "Produces" "Few Eggs" and "Invests" "Months/Years" in "Pregnancy" and "Care."
* A **Male** "Produces" "Trillions of Sperm" and can "Walk Away."
* Because the **Female** "Loses More" if the "Mate is Bad," she is the **"Quality Controller"** of the species.
* The **Male** is the **"Salesman."**
* "Behavior" is "Determined" by **"The Cost of the Child."**

'''3. The "Fashion" Cycle (Runaway Selection)''':
"Preference" for "Preference's Sake."
* If "Females" "Start" to "Like" **"Blue Feathers,"** then "Blue Males" win.
* Their "Daughters" "Inherit" the **"Preference for Blue."**
* Their "Sons" "Inherit" the **"Blue Feathers."**
* This "Co-evolution" (see Article 638) "Drives" the trait to "Insane Levels" (like the 'Irish Elk's 12-foot antlers').
* "Evolution" can be "Captured" by **"Trends."**

'''The 'Bowerbird' (New Guinea)'''': The "Ultimate" "Artist." The male "Builds" a "Complex Structure" (A 'Bower') and "Decorates" it with "Blue Objects" (Berries/Glass/Plastics). He "Doesn't Feed" the female; she "Only Chooses" based on his **"Interior Design"** skills. It proved that "Aesthetics" can be "The Primary Driver" of "Evolution."
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