Could you make it so subjects are more sensitive to tickling after cumming?
More ways to tickle other than just a feather would be wonderful.
A machine that auto tickles areas you drag it's arms/feathers to would be fantastic. Would be a nice research reward
Can you have it so the more places you tickle the more they struggle and the more they laugh?
sorry for necro-ing an old post, i really like the idea of a tickling machine that targets specifc areas of your choosing while you can focus on something else. sounds like a great idea
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