A person can produce oxytocin when hugging, which can give a person a feeling of peace of mind and safety, and there is a similar effect when hugging a stuffed animal.
Stuffed Animals for people is a kind of parent replacement, the child began is to sleep with their parents, when the child is older parents will let the child sleep in a room on their own, this time the child is afraid, mothers often put one or two of the stuffed animals in the child's bedroom, especially in the girl's room.
Parents use this to tell them that they are not afraid to cuddle with their toys at night and go to sleep.
Only the stuffed toy is treated like a parent and hugged tightly for psychological security. The result is that the person grows up still hugging the toy to sleep and may use the doll as a kind of parental substitute.
Such people are actually not well established when it comes to establishing an intimate relationship with their parents, in which children develop an attachment with their mothers when they are young, and this attachment affects their relationships as adults.
Holding a doll to sleep is partly a continuation of the habit of life, the other side is to seek psychological security, inside the child is a psychological shadow.
So it could be a lack of childhood. Don't worry everyone does it to one degree or another. In reality, cuddling a stuffed animal to sleep is not such a bad thing. On the contrary, the touch that a stuffed animal can bring will give us a sense of peace of mind. On our sleep quality, very helpful, the right size of the plush toy easier to sleep.