The photo site Shutterstock.com has an INCREDIBLE selection of photos. Some of them are cool & useful, while many others are inexplicable & hilarious. Here are 20 stock photos of "Sex" that fall squarely into that latter category:

1.

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A young Tim Heidecker gives Standing Butt Lady a round of applause.

 

2.

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This nurse-chef is clearly too shocked by this man's downwards diagonal penis to measure anywhere near it.

 

3.

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 Nothing like some gooooood "through the boxers" fellatio to make a dude's pupils vanish!

 

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This guy's either trying to imply that this lady's upper-left quad is the BULLSEYE, or trying to hypnotize her butt through old timey cartoon methods.

 

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SEXTING (verb): Typing the word 'SEX' real big on your phone and jamming it down your pants.