On™ Arousal Oil Chocolate 5ml Large Box. ON Chocolate is a chocolate flavored arousal product made with a unique blend of pure essential oils & extracts. When applied to the clitoris, ON Chocolate creates an exciting sensation that pulsates and vibrates the most sensitive part of her sensual body, and has a delicious chocolaty flavor for her partner to enjoy. ON Chocolate will dramatically heighten a woman's arousal, and most women feel as though they are lubricating MORE.