Jim C. Hines is a fantasy author who once reenacted some female poses from fantasy novel covers. Now he's trying out some men's poses from fantasy and romance novels.
It started with the top image. An artist called Blue posted a drawing of a Black Widow and Hawkeye cover with the poses swapped. Blue then issued a challenge to other artists: replace the female characters in other comics with Hawkeye. These are just a few examples of what happened next.