Why did Mattel create a Barbie doll wearing lingerie?

Apparently, back in to 80s I believe, the brides usually included lacy lingerie for the honeymoon.

This website reinstates this and shows you the doll:

http://www.youtube.com/watch?v=O7dehxkAUe4

There have been numerous Barbie dolls sold in pajamas or nightgowns. Some of them were:

1973--Burbank's Quick Curl Christmas gift set with #3348 Sunny Sleep-ins sold only in England

1980--Beauty Secrets

1985--Dreamtime

1994--Bedtime with Bed sold only at Sam's Club

It's not a conspiracy. It's simply another type of outfit for Barbie dolls to wear.