Mistress Talia: a sadistic domme

Anyone who has played with nipple clamps knows that while they hurt some going on, the real pain is during that rush of blood returning to the area once the clamp is removed.

A zipper magnifies that effect by allowing the domme to apply many clamps and rip them all off at once. The effect of using a zipper is not additive, the pain is exponentially more as more clamps are added.

You can make a zipper very easily and frugally with some clothespins and string.

You want the type of clothespins that have a spring with a hole in it. It doesn't matter if you use wooden or plastic ones. Each brand will have a different relative strength, so a wide variety of clothespins is a good thing for a toy collection.

When choosing clothespins, you can test their relative strength by clipping them to the webbing between your thumb and forefinger. Clothespins for a zipper should be looser than ones used individually as when a slave is "unzipped," it's going to be a much more painful effect than if a single one were released.

Choose a string that is long enough to reach all the areas you want to zipper. You need string strong enough to hold against the force of being unzipped. For most common clothespins, shoelaces are strong enough. The aglets facilitate lacing the clothespins.

Tie a large knot in your string and run it through the clothespin springs, then tie another knot at the end. That's all there is to it!

It's so fast and easy that you can have a bunch of zippers using clothespins of various strengths. I have about ten of them myself.