Cat People (1942)

  This is considered a horror movie and I guess it counts, since it does lean into to the supernatural aspect.  But it's not scary.  You could show this to kids and they'd probably be bored.

Oliver (Kent Smith) meets Irena (Simone Simon) at the zoo and begins pursuing her romantically.  They seem made for each other until Irena confesses that she believes she is descended from the Cat People, Serbian witches who were able to shapeshift into panthers if they felt strong emotions like desire, anger, or jealousy.  Out of fear for Oliver's life, Irena refuses to consummate the marriage, so he suggests she visit a psychiatrist, Dr. Judd (Tom Conway), who tells her it's all in her head.  Meanwhile, Oliver confesses his frustrations to his co-worker, Alice (Jane Randolph), who in turn confesses that she's always loved him.  Irena sees them out together and strong emotions are indeed felt.

It has good atmospherics but the sympathies are all wrong.  We're meant to be on Oliver's side as he deals with a mentally ill bride that won't fuck him, and fear for Alice the homewrecker's safety as she is stalked across town.  But in 2026, we are #TeamPanther.  Get his ass, Irena.  It's currently showing on the Criterion Channel with its much trashier (but very fun) 80s remake of the same name.