makes you depressed

When you go to a party, to meet friends or new and interesting people, the realization of overlarge hips, rounded shoulders, a drooping bust, makes you depressed.

Nye, Dorothy. 1936. New Bodies for Old: Why Where and How to Exercise for Figure, Beauty and Health. New York. Funk and Wagnall's Co. p.13

most engaging in a diamond

Petrified beauty ceases to be beautiful in a woman, though it is most engaging in a diamond. Beauty and charm call for constant adjustment to every changing circumstance.

Larison, Ruth. 1942. Those Enduring Young Charms. Harper and Brothers. p.12

you will not be able to retain her

 If you neglect beauty until she has packed her bag and is standing on the doorstep, you will not be able to retain her.

Vasta, Ann. 1947. Beauty Handbook. Woman's Book Club. London. p. 8

much to be desired

Though American women may have the most beautiful legs in the world – long, smooth and de-fuzzed – their feet too often leave much to be desired.
Corinth, Kay, Sargeant, Mary. 1966. All About Entertaining: Everything You Need to Know to Have a Fabulous Social Life. New York. David McKay Co. Inc. p. 392

exactly right

Each season there are new shades to consider…The violet of one year may have been very unbecoming to you. But a new violet shade may be exactly right because it is more pink, or more gray, or more blue, than it was formerly.  
Pierce, Beatrice. 1932. It's More Fun When You Know the Rules: Etiquette Problems for Girls. New York. Farrar and Rinehart Inc. p. 126

it isn't enough

Remember that it isn’t enough to know what is the proper thing to wear in the town or city in which you live. You have to know what is correct to wear when you travel.
Ryder, Mildred G. 1945. Dress Smartly. New York. Charles Scribner and Sons. p.77