I haven't quite understood where you have heard this thread is only of photos of women's breasts. While cruising through the author of the thread original post it mentions no specific gender.
You may also want to be a bit less rude, you are not the owner of the truth or the ruler of us all. He wanted to post, and he has the right.
Edit:
I went ahead and saw the tags, it has moobs included. Do I need to even explain my point?
Also how many dick pics you cruise here? Plenty, if you had to comment every single one you wouldn't have a life. Learn to ignore things you don't like. It's not that hard.