My thumb slid along the flesh, feeling, feeling for the eye.

Her thumb slid to the firing button for the U-2's machine guns.

Old Nathan's paired thumbs slid the base of the box rearward.

His thumb slid over her lips, just because he needed to know if they were as soft as they looked.

His thumb slid over the bend of her wrist and covered her pulse point.

He licked his thumb then slid his hand inside to cup her breast.

Her thumbs slid up and back under his jaw.

His thumbs parted the lips and slid the length of her labia.