On Arousal ULTRA is for advanced users as it is stronger than the Original On Oil. This is the absolute strongest, most intense formula. On Arousal ULTRA is for advanced users who love feeling the ultimate in sensation. It is the absolute strongest, most intense formula. On Arousal Original was the first of its kind. Well known for its powerful unique sensation. However more sensitive women were searching for something milder. In response Sensuva have developed ON Balm for Her. This product produces several sensations, from an immediate warming effect then followed by a tingling pulsing vibration which increases arousal and moistening. The combined effect is designed to cause orgasms that are quicker, longer-lasting, and more frequent. Some women have described this as the ultimate third level of orgasm.