He began to trace his finger along her belly. She didn't react. Still smiling, the man poked her just above her belly button. That sent a shock through Jessica's body: she involuntarily bucked at that. The man chuckled, and with all four fingers began running them sideways across her lower belly, just beneath her belly button. Jessica gasped, and sucked in her belly, creating a bowl. She had always been unbearably ticklish, and now this masked man knew just that. He grinned wickedly. "So, you ARE ticklish. That makes my job a whole lot easier." He dug in a little harder with his fingers, seeking to reach the muscles just beneath the skin of her belly. Jessica began laughing: she couldn't help it. The man paused, withdrawing his hand. He studied his victim. She was bound, with her whole belly exposed to him. Her stomach was rising and falling quickly, as she was clearly nervous and waiting for his next move. The masked stranger didn't take long. He took his index finger, and began tracing small circles around Jessica's belly button. Jessica began giggling, while feverishly hoping that he wasn't about to do what she thought he planned to do. Unfortunately for Jessica, the man didn't seem inclined to ignore her vulnerability.
Suddenly, the man plunged his finger into her belly button, which, she now noticed, didn't have the ring in it she was accustomed to wearing. But that thought passed, as she was now roaring with laughter and bucking up and down on the table she had been bound to. Her only thought was to try and shake the man's finger out of her belly button, but he kept it in place. Tears were running down Jessica's face, she was laughing so hard, and her breath was only coming in gasps. For extra effect the man wiggled his finger in her navel, and that sent fresh shocks through her body, and she continued laughing. She had never felt so ticklish before in her life! Finally, after what seemed like an age, the man withdrew his finger from her belly. He smiled. "So...your belly button is your weak ticklish spot. Good to know." After he said that, he reached for