This newspaper advertisement from the 1960's for a weight-gaining product is quite a testament to the ever-changing sociocultural values throughout the decades. In modern times one couldn't dream of seeing a product marketed to help you put on weight; diet cookies, drinks, and fads are the norm now.
Women's genitals are not portrayed with nearly the same reference, respect, and even admiration that the male phallus is given in media and throughout society in general. Here is (another) sexist vag-negative ad that just reinforces womens' already low genital self esteem.