For women that need an extra boost. INTENSE Clitoral Serum has a higher concentration of natural Japanese peppermint than our GENTLE Clitoral Serum. It can be used for clitoral foreplay, clitoral stimulation during intercourse, and clitoral stimulation with a toy. We suggest putting a pea-size amount of Serum on a finger and massage directly onto the clitoris. Intimate Earth products do NOT contain menthol which is irritating to the clitoris.