Why does the narrator want to giggle when the Gleason's in eat at her house all American slurp?

In "American Slurp," the narrator feels a mix of embarrassment and amusement as she observes the Gleasons' unconventional eating habits, particularly their loud slurping of soup. This behavior contrasts with her own family's more reserved dining etiquette, leading her to find humor in the cultural differences. The desire to giggle reflects her internal conflict between wanting to fit in and the absurdity of the situation. Ultimately, it highlights the theme of cultural identity and acceptance.