Arousal gel is the umbrella term for a range of topical products designed to enhance sexual arousal. The make up of arousal gel is very similar to water based lubricant. Many contain menthol or peppermint oil to create a cooling sensation and encourage blood flow to the genitals. Additionally, some brands add dietary supplements that are purported to boost libido. Arousal gels can be applied directly to the genitals, massaged on with a partner's fingers, or applied to a sex toy.