The following will work for both face up and face down bondage situations:
This assumes you are at a hotel with bondage cuffs, rope and the other ideas I will present below...
Face down:
If you are tickling a lee who is face down, immobility is MUCH easier to attain...honest.
First make sure that the lee's feet hang just over the end of the mattress, so that the feet can't flex away from your fingers, with some nice toe bondage, attach the toe bondage downward so that the toes and the bed are now pinning the feet against the bed.
(IF you tickle face up, you will have to get more creative, I suggest tiying the feet together, not spread-eagle, then you can attach the ankles to the bedposts and then tie up the toes and attach that to the ankle cuffs already in use.)
Second,
Have your lee stretch thier arms up, next to thier head, attach the bondage cuffs to thier wrists and tie left arm to the RIGHT bedpost, and the right arm to the LEFT bedpost, make sure you run the ropes up and over the front of the mattress. This way the arms cross at the wrists and leave the armpits very vulnerable.
(This works for face up as well, although the ears will be much harder to access)
Third,
I have never done this but it made me think about keeping the middle area immoble.
Have the lee bring a pair of shorts(Jean shorts would be best) with a strong belt, now cut the jeans so that just the belt area and maybe an inch or two of fabric is still on the shorts.(THis assumes you are doing naked tickling, if not, simply keep the shorts intact.)
Now attach additional rope to the belt and shorts loops to the backside of the jeans, jeans usually have 2-3 loops across the back.
Now run the rope throught the 2-3 jean loops. Now take the extra length from the right side and run it under the bed/mattress to the LEFT side and the extra bit of rope from left to the RIGHT side.
Then tie the two extra lenghts together.
This will keep the hips down on the bed and the jeans won't budge(the belt is to help support the jeans loops.
This may hinder some tickling to the hips area however, if the lee has low-rider jeans this would allow easy access to the hips lower belly/back area.
Four and five are if you are working face down:
Forth:
Get a medium/large sized mirror to place in front of the lee's face so you can see thier facial expressions while tickling other areas of the body.
Fifth:
If the lee has long hair, request they put it in a pony tail or bun, so you can see thier face through the mirror when you have them trashing an ticklish agony or bliss😉
Sixth:
For the really immobile.
Obtain a neck bondage collar with loops.
Now do the same thing you did with the shorts.
Attach the rope to bondage collar and run the excess ends in the opposite directions.
Now the neck in not going to move AT ALL!!!
Seven:
Knees
IF the lee is face up/down and has thier legs together, simply bring another belt and secure it around their knees, above the knee around the thighs, then attach ropes to the belt buckle and run the ropes around and under the bed/mattress.
If the lee is face up/down and has their legs in the spread-eagle position, use two belts and TWO SEPERATE ROPES.
Attach the belt to the right lower thigh above the knee, now attach the rope to the belt buckle, now run the rope out the right side and under the bed or mattress and attach it to the other side of the bed or mattress, now repeat for the left leg.
Do not attach these ropes together or you will have the ropes pulling against each other at the knee area possibly causing harm, you simply want them immoble, not in pain(this is an assumption).
With all of these in place the lee isn't going anywhere.
Total immobility takes alot of time!!! this would probably take a good 45 min to an hour of setup.
But in the end your lee isn't going ANYWHERE!
The arms are fully stretched out and feet are secured and not wiggling, the hips won't buck, the knees won't give any leverage and now all the ler has to do is turn on the sonicare and go to work 😉
For me, I have never gone to all this trouble.
I simply tie the arms and legs spread-eagle, sometimes I tie the toes back to ankle cuffs, but this ends up hurting.
However, I may have to include my hip belt idea so the hips don't go completely wild when I hit the pockets or bellybutton.
I hope this helps.