There are many reasons why someone might choose to use a wand vibrator. Here are some of the most common reasons: 

1. Powerful stimulation: Wand vibrators are known for their strong, deep vibrations, which can provide intense pleasure and orgasmic sensations. They are especially effective for people who have difficulty reaching orgasm or need a higher level of stimulation than other toys can provide. 

2. Versatility: Wand vibrators are designed for external stimulation, but can be used on a variety of erogenous zones, including the clitoris, penis, nipples, and perineum. They can also be used for deep tissue massage on sore muscles. 

3. Accessibility: Wand vibrators are often easy to use and hold, and can be a good option for people with mobility or dexterity issues. 

4. Solo or partnered play: Wand vibrators can be used for solo masturbation, or incorporated into partnered play for shared pleasure and experimentation. 

5. Increased arousal and pleasure: Using a wand vibrator can increase blood flow and arousal, which can lead to more intense and satisfying sexual experiences. Overall, wand vibrators are popular for their powerful and versatile stimulation, and can be a great addition to anyone's sexual repertoire. As with any sex toy, it's important to choose a wand vibrator that is made from body-safe materials, and to use it safely and according to the manufacturer's instructions.