Thumb and two fingers then use hand when I cum.

Two is all I've ever used, its not big enough for more.

While my length is less then the width of my palm, my girth is high so I grab it with my whole hand but only three fingers fit the length so I use my 1st, 2nd, and 3rd. I use my pinky to grab my sack and make it move and bounce, which with the weights I wear feels unbelievable!

same here, i usually use my thumb and forefinger, or my hitachi wand.