The inflatable doll is a type of male masturbation device. When inflated, it is the same size as a real person, and its skin is made of non-toxic PVC. This kind of masturbation product gives people a sense of possession; when hugged in bed, it feels similar to a real person. The inflatable doll provides you with the experience of having it whenever you want. Inflatable dolls are different from children's dolls. After being inflated, they are softer and elastic. After deflating, they can be washed and reused. Modern inflatable dolls first appeared in late 1930s Germany and Japan, and were initially mainly used for military purposes, such as in Japanese Navy submarines. At that time, inflatable dolls provided sexual relief in all-male environments.