Normal sexual bondage. Image source: Training of O. com.
Here's Abnormally Bound, a better than average tumblr photo blog of women in bondage. Not a lot of SM, I like that. By the person who wrote the Slave Bride post on being gagged. As usual, total lack of attribution for the photos unless the image happens to have a watermark. I wonder why tumblr hasn't had its ass sued off?