Vibrators come in all different shapes and sizes. They can be extremely pleasurable, so much so that many women who’ve never had an orgasm find they can have one using a vibrator. Vibrators are extremely safe if you keep them clean.
If you’re planning to share a vibrator or dildo with another person, put a new condom over it each time you swap over. If you plan to use it on yourself afterwards, throw out the old condom and put a new condom on. This will prevent sexually transmitted diseases passing between you and your partner.