Intimate Earth understands that not all women are created the same. Some women are sensitive and others need an extra boost. INTENSE Clitoral Serum has a higher concentration of natural Japanese peppermint oil than the GENTLE Clitoral Serum. Both can be used for clitoral foreplay, clitoral stimulation during intercourse, and clitoral stimulation with a toy. We suggest initially putting a pea-size amount of serum on a finger and massage directly onto the clitoris, more can be added if desired. Intimate Earth products do NOT contain menthol.