The lessons "Hotel Transylvania" taught us about love (and why they're insane) *Spoilers*

Hotel Transylvania's central love story is that between Dracula's daughter Mavis and backpacking slob Johnny "Johnnystein". When they first look each other in the eyes, there's a "Zing", y'know, like the FANTASTIC pop song that accompanied the movie. Dracula does not approve and threatens Johnny to stay away.

Toward the end of the movie it is revealed that Mavis' departed mother's last gift for her 118th birthday is a book, in which she claims "a Zing only happens once in your life", convincing both Dracula and Mavis that she is now doomed to spend the rest of eternity unloved and unhappy.
This leads to Dracula racing to stop Johnny from leaving, teaching us the valuable lesson that his daughter's happiness is more important than his perceived notion of her safety.

Adults, being experienced in the field of love, will also be able to tell that the whole Zing-thing is complete bonkers.
1: While love at first sight has been known to happen, it is not the basis for a sturdy relationship. In a relationship you have to respect each other's boundaries, tolerate each other's faults and be able to forgive each other in addition to looking each other in the eyes a lot and then babies happen. None of this are you able to judge with a single glance. Falling in love can happen over the course of weeks or months, and some people even start dating first and only develop deeper feelings over the course of their courtship.
2: Telling a teenager that True Love only happens once can be outright dangerous. How can they know the difference between a hormonic obsession and true, mutual feelings? How can they know which one of the times they fall in love that is "the right one"? If they develop feelings towards someone else while they're already in a relationship, then what the heck is going on? And if they're broken up with, then what happens then? A life of misery and loneliness? Teenagers can seriously hurt themselves with those kinds of ideas.

Hotel Transylvania is only part of the larger problem: Just like the screwed-up ideas of justice that have been pushed by action-movies since , this kind of stuff has a big influence on especially teenagers.
It has resulted in a split generation where even sleeping with an ex is a friendship-ending-sin, almost reducing them to a sort of property. Where the virgins and the promiscuous are shunned alike, the latter almost exclusively among girls.
It makes no sense in this day and age, it's based on archaic values and it only serves to bring us humans misery. If we want to be happy, we have got to discuss this kind of stuff. With a blog, for instance.

Post Script: The movie is well-animated and voice-acted, and has some funny moments. If you can suffer through the crummy story and horrendous pop-music, there's a lot of good stuff to take out of it.