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he tweaked the boy's ear.

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He gave the boy’s ear a painful tweak.

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engineers tweak the car's operating systems during the race.

This causes it to polymerise and then change shape, which means the ophthalmologist can tweak the lens to alter its power.

Additional, my individual has a remedial constipation and eupeptic tweak, the both hands before sleeping namely is put on abdomen left, both sides is kneaded 100 times each, very the canal uses!