The goal of this thesis is to examine whether perceptions of too much self-expansion affects shared leisure experiences. I hypothesize that too much relational self-expansion will be associated with a tendency to engage in less exciting and more familiar shared activities. In Study 1, relational self-expansion was manipulated (i.e., too much, just enough, not enough) in hypothetical couples and participants rated the types of dates (i.e., exciting or familiar) the couple should engage in. In Study 2, participants reported their own relational self-expansion and rated the excitement and familiarity of the date they planned. As predicted, when participants read about someone experiencing too much self-expansion in their relationship, they selected dates for the couple that were more exciting and less familiar (Study 1). However, these findings did not extend to people's own relationships (Study 2). The findings in this thesis provide insight on how self-expansion perceptions affect relationship maintenance behaviour.