28...
We'll find out another time. As fun as it would be, I do not wish to break you during our first play date. Put down the spoon, it's time for you to stroke again. Just the shaft. Go slowly and savour the pain. *laughs*
Slowly, bring yourself to the edge. As soon as you reach it, remove the clamps from your nipples and reapply them, 90 degress from their original rotation.