I feel this may have gone over people’s heads earlier: Sully from Monsters Inc is gay and in a relationship with Mike wazowski. They stuck together even when they were both kicked out of university, when they had no reason to, in order to support each other into getting their dream jobs. Sully always wanted to adopt a child; Mike never wants children: hence their disagreement over Boo in Monsters Inc. The majority of their story we are shown displays the endearing closeness of their friendship in environments that are traditionally hostile to gay men: you’re not going to kiss in the workplace and you’re sure as hell not going to admit romantic interest in some dweeb when you’re a fuckin frat boy.
Tl:Dr; Mike and Sully are gay and the central conflict of Monsters Inc is them disagreeing over adoption