Got an email to remove this image from my gallery:

http://www.3dfantasyporn.com/images/3d-hardcore-07.jpg

I’d like to know, what policy is it violating? This is from a set of pictures I created myself, and all it shows is a man with a hard-on asleep, so not sure what is wrong with it, and why I have to remove it? I’m happy to do so, but stumped why I was asked.