clothespins, slowly applied ... blindfolded and slowly, so slowly squeezing shut. Then another. Another. And so on ...

Then removed quickly. Still the blindfold, and not knowing when it is going to happen, but knowing that it WILL happen. Maybe a little playing of other sorts between application of pins and the sudden removal. Not ripping, but all removed in seconds so that the blood rushes to all the parts that have been pinned.

Almost as nice, and again partly because of the surprise -- flogging my backside with legs outspread and the random application to my balls.