Nipple and clit pumps can be used for enhancing sensitivity and arousal in those areas. Here are some tips and information to help you use them safely and effectively:

1. Choose the right size: It's important to select a pump that fits comfortably over your nipples or clitoris. Sizes can vary, so choose one that provides a snug but not overly tight fit.

2. Start with arousal: Before using the pump, engage in foreplay or stimulate the area manually to increase blood flow and sensitivity.

3. Lubrication: Apply a small amount of water-based lubricant to the rim of the pump to create a better seal and increase comfort.

4. Suction control: Most pumps have a mechanism to control the suction level. Start with low suction and gradually increase as desired. Be attentive to any discomfort and adjust accordingly.

5. Pumping technique: Place the pump over the desired area and gently squeeze the pump bulb or trigger to create suction. Be cautious not to over-pump or use excessive pressure, as it can cause discomfort or bruising.

6. Time limits: Begin with short sessions, around 5-10 minutes, and gradually increase the duration as your comfort level allows. Avoid prolonged pumping to prevent potential bruising or injury.

7. Sensations: Pay attention to the sensations you feel during pumping. It should feel pleasurable and mildly intense, but not painful. If you experience any discomfort or pain, stop immediately.

8. Aftercare: After using the pump, gently remove it and allow the area to rest and recover. Applying a moisturizer or aloe vera gel can help soothe the skin.

9. Hygiene: Clean the pump thoroughly before and after each use to maintain proper hygiene. Follow the manufacturer's instructions for cleaning and storage.

10. Communication and consent: If you're using a nipple or clit pump with a partner, open communication and consent are essential. Discuss boundaries, preferences, and any concerns beforehand.

Remember, everyone's experience and preferences may vary, so it's important to listen to your body and adjust accordingly. If you have any specific concerns or questions, it's always a good idea to consult with a healthcare professional or a sex educator.

Safety is of utmost importance when using any sexual device. Here are some additional safety tips and a safety guide for using nipple and clit pumps:

1. Quality and materials: Ensure that you're using a high-quality pump made from body-safe materials such as silicone or medical-grade plastics. Avoid pumps made with potentially harmful materials like phthalates.

2. Allergies and sensitivities: If you have known allergies or sensitivities to certain materials, be sure to choose a pump that is compatible with your body.

3. Avoid broken or damaged pumps: Inspect the pump before each use. If you notice any cracks, sharp edges, or signs of damage, do not use it, as it may cause injury.

4. Pressure and suction limits: Do not exceed the recommended pressure or suction limits specified by the manufacturer. Over-pumping or using excessive pressure can lead to discomfort, bruising, or injury.

5. Avoid using on broken or irritated skin: Do not use a pump on broken, irritated, or inflamed skin. This includes cuts, abrasions, rashes, or recent piercings. Wait until the area has fully healed before using a pump.

6. Sensation check: Regularly check in with yourself during pumping to ensure you're experiencing pleasurable sensations without any discomfort or pain. If you feel any pain, numbness, or excessive sensitivity, stop immediately.

7. Blood flow restriction: Avoid using a pump for an extended period or with excessive pressure, as it can restrict blood flow to the area. Restricted blood flow can cause tissue damage, bruising, or other complications.

8. Personal limits and boundaries: Respect your personal limits and boundaries when using a pump. If something feels uncomfortable, painful, or goes against your preferences, stop using it.

9. Storage and cleaning: Store your pump in a clean and dry place, away from direct sunlight or extreme temperatures. Clean the pump thoroughly before and after each use, following the manufacturer's instructions.

10. Seek professional advice if needed: If you have any specific concerns, pre-existing health conditions, or if you experience any adverse reactions or persistent discomfort, consult with a healthcare professional or a sex educator.

Remember, safety and comfort should always be a priority when exploring new sexual experiences.