The similarities between Frances and Michael are not so much their similarities of personality, but instead, their actions and ways of avoiding and bypassing having to talk about the situation that they are in. This is shown at the end of the short story when Frances requests of Michael "do you want me to call the Stevensons?" and he replies "call them up" This sudden change of subject is how the two characters feel they can put the problem of Michael's infatuating eye at rest for the time being, though of course this is not so as it is evident that there have been previous, countless discussions about the matter. Their decision to go to the pub and have a few alcoholic drinks early in the morning could be perceived in two ways, perhaps it was a common ritual in the nineteen thirties and forties or maybe both were just looking for a quick escape and method of relaxation that can be brought about by having a quick drink of scotch.
The way that Michael and Frances handle their problematic issue and their reactions to the various incidences that occur are the main differences between them. On one hand, Frances becomes irritated at Michael and jeers at him for being insensitive to the fact that he is hurting her emotionally. Michael, obviously enjoying the many views of New York takes a lighter approach to the situation. He laughs and jokes through their entire outing right up until the mood suddenly intensifies between him and Frances. He becomes overwhelmed and is then forced to act in a more serious manner. Frances is the typical dramatic woman who cries silently into her handkerchief and Michael is sipping his scotch and saying calmly "I love you. But I also want them." Clearly this is not the best thing to say to an emotional woman, and through the two characters this further brings out the differences between the two sexes. This could be considered a conflict of individuals, but if one looks at the larger overall picture it is quite clear that in fact, it is a conflict of gender and stereotypes in society.
Therefore, Girls in Their Summer Dresses by Irwin Shaw, through an analysis of Michael and Frances and by comparing their similarities and differences and it can be concluded that they represent the stereotypes of their sex. Furthermore, it can be debated whether or not they will ever manage to solve the problem of Michael's wondering eye in time to save their marriage.