Zoenzucht (2000)

Every time Engel de Wit tries to kiss a boy, something horrible goes wrong: the boy collapses and loses consciousness. This (very hot) summer Engel can't bear it any longer and she goes to a doctor, but even he can't think of a cure. He asks the help of a scientist who is familiar with her disease (Plato's syndrome), but the scientist only sees her as a freak. Meanwhile the doctor has become very interested in Engel.