In Phillip K. Dick’s Clans of the Alphane Moon, the procedure is named while introducing Mary:
“Let off on the roof field Mary descended by in-ramp to floor ninety, came to the glass door, hesitated, then allowed it to open and entered the outer office in which Mr. Field’s receptionist — very pretty, with much make-up and a rather tight spider-silk sweater — sat. Mary felt annoyed at the girl; just because bras had become passe, did a girl with so pronounced a bosom have to cater to fashion? In this case practicality dictated a bra, and Mary stood at the desk feeling herself flushing with disapproval. And artificial nipple dilation; it was just too much.”
What was nipple dilation? Some new fashion trend? Some type of more permanent surgery? Was it ever explained?