In an interview Isabella Rossellini mentioned one of her mother's photos saying that she looks older than her age because at that time women tried to look more ladylike. I think she is right, proof being these 1950 models from Givenchy. They are for sure very young. Nevertheles they look restrained and calm and the only provocatory hint is given by their smile and the look in their eyes.
Source We Heart Vintage
Somehow this picture is different. I do not criticize and I do not dislike it but nowadays the trend is more casual and we all try to look younger.