In the comments section, Fee provided a very nice summary of the documentary:
There were a few women featured in the documentary. One was very sad, someone who had looked after her grandchild as a baby due to his mother's illness, and then had lost him because her daughter recovered and went off to New Zealand with the baby. I could understand why she wanted a grandson subsstitute, but it made me sad that there are so many families around who could do with an adopted granny with real children that she could hug, and instead of finding them she found a rubber baby.Link (Thanks, Phil!)
One of the women was as mad as a box of fish, and had multiple fake babies because the real thing might make a noise or ruin its clothes. She made me very glad that she could have rubber babies and not the real thing. While most real parents hate that whole lugging around the pram and bottle and nappy bags thing, she loved all that - for a pretend baby. I think the truth is she is still a little girl at heart, and couldn't bear not to be the focus of everyone attention. If she takes her fantasy too much further she may find herself the centre of everyone attention - down at the local psychiatric ward.
Another woman who briefly appeared seemed to have a toy show in her house, hundreds of babies in cots crammed into a room. That seemed a bit obsessive compulsive really.
I think some of them are fantastics works of art in the realism, but I agree with others that the more real they are, the more creepy. In general, although I am a woman, I found the men's reactions to them most normal... nearly all regarded them as disturbing and macabre.