I think the writers are using that kind of language to show the personality of that character. He doesn’t want to admit (or can’t see/believe) his girlfriend left him because he was a bad partner, and so explains it by saying she became a lesbian. By doing this he absolves himself of any blame, fault, or responsibility for the relationship failing.
What are these minimal fees, and what are they for? I’m always skeptical of these online learning providers that imply they are free but don’t quite say as much.