Ofelia was an ambitious psychology student. Determined to gather data for her paper, Ofelia enlisted the help of her friend Sandy, who was always up for quirky experiments. Sandy, agreed to be the subject of Ofelia's ticklish investigation. And experiment started . Ofelia tied Sandy at the designated tickling area, a comfortable sofa. She took off her top as well to expose her ticklish spots. Ofelia, with a mischievous glint in her eye, started exploring Sandy’s neck, armpits, small, pierced nipples and ribs, taking notes between tickling sessions. After upper body it’s turn for legs: would it be itchier? Ofelia’s fingers go between the thighs, to the crotch. Down, to the feet, trying to tickle every area on the girl's body. In between giggles, Sandy wiggles her body and moans from pleasure. The experiment continues Ofelia tries to be gentle and harsh, varying between soft strokes and deep digging into the skin. She also tries a lot of tools: such as big make up brush, sharp pin wheel, an electric toothbrush. Oil helps to increase the sensitivity when Sande is almost exhausted from such a ticklish treatment. Eventually, the laughter subsided, and Sandy caught her breath. Her skin is swollen and red from all the touches.