I had the thorough pleasure of administering a tickle torture session to a young man the other day.
To My delight, his entire body was sensitive to being tickled and so I had plenty to torture during the hour.
I had him lie down on the bed, tied his wrists together above his head and got to work!
First I started tickling his very ticklish feet with My fingernails, before grabbing hold of his ankles and mercilessly tickling his feet with a toothbrush as well as a dog grooming brush which has natural bristles on one side and metal bristles on the other, providing a variety of sensation.
I then moved on to his under arms and hips, and got a thorough work out making him squirm and squeal like a little ticklish pig!