sentences:  The tied person may also be blindfolded to increase the anxiety and surprise element.The objective of such games is to generate uncontrollable writhing, struggling, laughing and vocalizations etc., from the person being tickled, while the person tries to control such reactions, without the ability to physically defend the ticklish spots.In dominance and submission scenarios, sexual partners may agree upon a safeword such as "falafel", "watermelon", or "bicycle" to signal that tickling should stop.