These explains everything. Literally.

 

1.

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Source: blogspot

2.

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Source: reddit

3.

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Source: theoatmeal

4.

 

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Source: imgur

5.

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Source: graphjam

 

6. 

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Source: giveupinternet

7.

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Source: graphjam

8.

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Source: lolsheaven

9.

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Source: swagct

 

10.

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Source: chzburger

 

11.

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Source: cheezburger

12.

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Source: graphjam

13.

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Source: thepoke

 

14.

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Source: graphjam

15.

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Source: thepoke

16.

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Source: iambored