The shiny chrome Bumper Boobs on the Cadillac and later morphed to smaller ones on the Chevvies. Everything marketed by US (and now it's spread all over, since everyone wants to sell to the United States of Consumers) is about, pure & simple:

Sex Sells. It always does - in any society whose origins include repression of the 'pleasurable' as Sin. What could be more obvious than this fact about places which worship Authority?

From electronic circuit boards held by a female to.. no doubt tombstones. This particular ad simply manages to begin from:

A) What would piss off the Puritans the most?
(But subtly enough that they would be embarrassed to explicitly state what is in their lascivious sanctimonious little minds)
B) What would appeal to the 11 yo who wonders what IS actually under a little girl's dress?
C) What would appeal to the older-than 11 yo - who always wants to fantasize about, what's under THAT dress? Any dress. Any time. Circle jerk.

HTH,

Ashton