Adult vibrators have come a long way from the early plastic models that just barely resembled a penis. In those days, the adult vibrators were called personal massagers and were advertised with pictures in a standard Sears catalog type product magazine. Seldom were the real uses of the adult vibrator listed and the pictures used in the ad more often than not featured a woman caressing the massager with her cheek.
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The typical modern adult vibrator not only resembles a real penis, but more often than not will so closely resemble a penis in appearance and feel that it would be difficult to tell the difference between the adult vibrator and the real penis. They are used for anal and vaginal stimulation in women and anal stimulation in men. There are many different types and shapes of adult vibrators.
Anal adult vibrators are tailored specifically for the needs of someone desiring a little anal action. Of course the differences between the anal vibrators and vaginal vibrators are few as the same basic shape can be used to stimulate both areas. Those meant specifically for vaginas will sometimes have additional attachments to stimulate a woman's G spot which of course wouldn't work going in from the other end.