The original concept was an attractive model covered in whipped cream. They made arrangements with a model but she said she couldn't do it right away because she had an international trip to make.
When she finally arrived, she was seven months pregnant with a noticeable baby bump. They decided to hide this by having her sit down for the shoot. However, the hot lights quickly melted the whipped cream faster than the artist could cover her so they switched to shaving cream which could, at least, hold its form a lot longer.
So the album cover that attracted millions of lustful eyes was actually a woman covered up to her cleavage in shaving cream who was seven months pregnant. And now you know the rest of the story. G'day.