When penetrated, a vacuum is formed inside the doll’s entries which provides a powerful suction effect. This effect is strongest in the doll's oral entry for mind-blowing blowjobs. Some of doll users have reported intense orgasms due to this specific feature.
The inside of the vaginal and anal entries are molded as part of the dolls and have texture and shape which make them feel very much like a real person. A doll's vaginal lips can be stretched apart very realistically and the newly sculpted labia are even more realistic than some of the older style labia. The oral entry has very soft, stretchy lips, ultra soft tongue (available as custom option as Enhanced Mouth), soft silicone teeth (available as custom option as Enhanced Mouth), and a hinged jaw that opens and closes very realistically. The tongue can be removed to allow for more space and easy cleaning. The inside of the mouth is ribbed for a very pleasurable effect.