True, it's twee and neatly swerves the cheating bit.
But prompted by the use of Andrew Gold's Thank you for being a friend on a TV ad recently , I've been listening to some songs from that era, the late 70s/early 80s and reading the lyrics, and there seems to have been quite a theme of exploring interpersonal relationships, usually in a positive way, and not always the moon-june-achey-breaky-heart kind of relationships.
Thank you for being a friend is uber-twee, but very sweet, it is actually a song to a friend, no subtexts or anything.
Lucky Stars by Dean Friedman is cornier than Kansas in August, but is about a couple working through suspicion and insecurity - in a very twee way, but nonetheless...
Dan Fogelberg's Same Old Lang Syne is about a chance meeting with an ex in a grocery store, and I think it's lovely; they are happy to see each other again, but then start to run out of things to say to each other - a realistic touch that saves it from tweeness I think, as is all the bars being closed because it's Christmas Eve so they have to buy beers and drink them in her car.
Paul Simon's Still Crazy After All These Years deals with the same topic but it's mostly about the narrator, there's nothing about the ex and the encounter, except that they drank themselves some beers..
So the Pina Colada song is a bad example of what I think was an interesting period when serious relationship issues and feelings and complexities were dealt with in light radio-friendly pop songs.
Did I miss my vocation in Cultural Studies??😏