Cathy III Dual Stimulation Vibrator: How to Use Both Motors

By Joystick | Discreet Adult Toys | Published: 2026-11-02

Category: How-to Guides

Learn how to use the Cathy III Dual Stimulation Vibrator's two motors for blended G-spot and clitoral pleasure, with step-by-step settings and technique tips.

Quick answer

Start with the insertable arm in place and both motors on their lowest settings, then adjust one motor at a time until you find a comfortable blend. Use the external arm for clitoral contact and the internal arm for G-spot pressure, and change settings before changing position.

Why two motors change your approach

A dual stimulation vibrator like the Cathy III gives you two independent sources of vibration: one in the insertable arm and one in the external arm. That means you are not just choosing a single intensity; you are balancing two sensations that can either complement or overwhelm each other. Starting with both low lets you feel where each motor lands before you turn anything up.

The most common mistake is treating the two motors as one control. If you raise both at once, you may push past a pleasurable level on one side without noticing. Adjust one motor, pause, and notice the difference before touching the other.

Settings and technique: what to expect

The Cathy III Dual Stimulation Vibrator has a 152 mm insertable length, so the internal arm reaches toward the G-spot while the external arm rests against the clitoris. Because the insertable portion is fixed in shape, your main adjustments are angle, depth, and motor speed. Try a shallow insertion first to see how the external arm aligns; then adjust depth until the internal curve feels like gentle pressure rather than a poke.

If you have not used a dual motor vibrator before, keep both motors on the lowest setting for the first few minutes. Many people find that a low, steady hum on the internal arm plus a slightly higher external setting gives the most comfortable blend. There is no single correct combination, so treat the settings as a dial you turn gradually, not a preset you must match.

Step-by-step: using both motors

Start with both motors on low: Turn on the Cathy III and set both the internal and external motors to their lowest speed. Insert the internal arm slowly, angled slightly upward, until the external arm rests comfortably against the clitoris. If you feel any pinching or discomfort, withdraw slightly and adjust the angle before increasing speed.
Adjust the internal motor first: With the toy in place, increase only the internal motor one level at a time. Pause at each level and notice whether the G-spot pressure feels pleasurable or numbing. Stop at the highest level that still feels comfortable. A common mistake is chasing a higher number; the right setting is the one you can relax into, not the strongest one.
Then adjust the external motor: Now increase the external motor separately, starting from its lowest level. Keep the internal motor where you left it. The goal is to find a clitoral intensity that adds to the internal sensation without distracting from it. If the external vibration starts to feel sharp or itchy, drop it one level rather than changing the internal setting.
Try slow movements before changing settings: With both motors set, try gentle rocking or a slow in-and-out motion rather than fast thrusting. Small changes in angle often do more than a jump in speed. Give each adjustment 30–60 seconds before deciding. If you feel close to orgasm, resist the urge to turn both motors up; keep the settings steady and let the stimulation build.
Switch off one motor if you feel overstimulated: If the combined sensation becomes too intense or numbing, turn off the external motor and continue with internal only, or vice versa. You can always turn the second motor back on once you have reset. Overstimulation is a signal to simplify, not to push through; one motor is still a complete experience.

Product facts

Cathy III Dual Stimulation Vibrator: Insertable length is 152 mm, with color options in pink and blue. The 152 mm insertable length gives most users enough reach to settle the internal arm against the G-spot while the external arm stays in contact with the clitoris.
Cathy III Dual Stimulation Vibrator