To determine how partners’ relative body weights affect their relationships, researchers collected data from couples of varying girth profiles (e.g., both healthy weight, both overweight, or mismatched weights). Couples responded about their daily conflict and the frequency with which they ate meals (and, presumably, Cheetos) together. Couples with an overweight woman and healthy-weight man experienced the greatest level of conflict; overweight male - healthy female couples had the lowest levels of conflict. Importantly, mismatched-weight couples who ate together more frequently reported more conflict, regardless of which partner was overweight (apparently, it’s a lot easier to be critical if you see what your partner eats).
Burke, T. J., Randall, A. K., Corkery, S. A., Young, V. J., & Butler, E. A. (in press, 2012). “You’re going to eat that?” Relationship processes and conflict among mixed-weight couples. Journal of Social and Personal Relationships. doi: 10.1177/0265407512451199