A surprising early memory
I've asked before on this group, what was your first awakening to cuckolding. Mine was watching affair scenes in movies, feeling empathy for the main character (often not seeing they're getting cheated on) yet also feeling turned on, despite putting my feet in the person getting cheated ons shoe's.
I just thought earlier then that though, might've actually been from 'The Rescuers Downunder' movie when I was a kid. No, there is no sex scenes or stuff like that of course, but when the main character's loce interest was coincidentally ignoring his advances to propose to her, and she was enamoured by the 'Australian Mouse' often making him third wheel, it made me feel something as a kid I didn't have the concept of back then. That notion of watching yoir girlfriend/love interest etc. Even coincidentally ignore you, and find someone else attractice, yet secretly wanting to see how far it'd go between them to watch.
That movie is by far not the only cartoon to make that trope either.
If anyone thinks I'm being non genuine, remember I was only about 5 or 6 there... I do have a good memory though, and of course can put on adult understanding over childish memories back then.