Those are definitely able to be tied and clamped. I've got some clamps of my own design that I make.
That could be round two, clamping and tying. The clamp I designed is better because it doesn't cut off circulation. It still makes them bulge deliciously, but they don't turn purple.
What do you two think of my first answer?
Also, can we see a nude not taken on a potato? I'm not asking for super high-res, but height and width measured in the hundreds of pixels would be nice.