Final answer:
The term referring to the lack of established relationship scripts for same-gender couples is 'relational ambiguity'. This term captures the uncertainty these couples face due to the absence of societal norms guiding their relationships.
Step-by-step explanation:
The experience of same-gender couples not having well-established dating and relationship scripts to follow is referred to as relational ambiguity. This term reflects the uncertainty and lack of societal norms or scripts that such couples can rely on, in contrast to heterosexual couples who have more traditional and socially recognized patterns to guide their relationships. Without these established scripts, same-gender couples navigate their relationships without clear societal expectations or models.
Homophily refers to the tendency for people to form connections with others who are similar to themselves, which can limit exposure to diversity, leading to more homogeneous social groups. Meanwhile, endogamy represents marrying within one's social group, and hooking up refers to casual sexual encounters. These terms do not accurately describe the lack of established scripts for same-gender couples.