Those are all really interesting theories, but the simple matter is that if it was referencing homosexuality, there were plenty of appropriate words Paul could have used.

Specifically, erastes and eromenos.

The words Paul used certainly have sexual connotations, but if he meant gay sex, plenty of words already existed for it.

There’s a ton of theories, but no one “knows” exactly what Paul means here. It’s a strange word with almost no parallels anywhere else in history.