HAs anyone tried breast binding?
It doesn't work well on someone with small tits (mine are a 36B) but I can get some good sensations out of it. Anyone with large tits would get more out of this exercise in pain.
I have a couple of old bedsheets cut into strips, and I wrap them around my upper chest, from armpit to the floating ribs (the bottom of my ribcage). Under the wrapping I'll put some irritant (I use the small pebbles people put in the bottom of fishtanks) but marbles might be better for a sub with large breasts, or even thumbtacks if you like that. Or even child's jacks.
Wind the strips of sheet as tight around the ribcage as possible. The intent is to crush the breast flesh as tightly into the chest as possible. It's just uncomfortable at first, but the longer the wrapping stays on the more intense the pain becomes. For extra punishment (this is impossible for me, trying to do it to myself) you might have her lie on the floor on her stomach and bind the hands and feet together behind the back in a hogtie. The weight of the sub's body coms to rest on the compressed breasts, and the pain from the pressure on it as well as the pain from whatever irritant is in the wrapping gets really intense. I'll beg for my imaginary master to let me out after an hour.