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What Is It? - Solution

Congrats to Bigredkev, who successfully guessed that the "What Is It?" image was a cropped image of a nipple up close. You can see the full image here. (Source)

Not sure if I'll continue contests such as this in the future or not - Two guesses isn't exactly what I had hoped for.
Image Source

Thanks to Kev and Skeeter for your comments!

What Is It?

This is a new contest, which I may or may not continue, depending upon your response. Yeah, this one's pretty easy. Answer later..