1950s style gender and relationship dynamics didn’t translate well in the 1970s either. Which is why the musical Grease is a satire of the sort of cultural values expressed by the parents of the contemporary youth and of their hypocrisy. Sandy changing everything about herself to be a better partner for Danny is meant to be seen by the audience as a sad and self destructive thing to do for a relationship. The way they treat sex and pregnancy scares is a shot at adults in the 70s who were railing against promiscuous teenagers while pretending they weren’t exactly the same but with worse education about it. We’re supposed to on some level be disgusted by the characters and their choices by the end of the musical, because it’s a send up of 50s nostalgia rather than an uncritical celebration of it.