Michael J. Fox and Lea Thompson in Back to the Future (1985)
Young Lorraine Baines and (her son) Marty McFly :
"When I kiss you, it's like I'm kissing... my brother."
The two films didn't exactly get the same reception and recognition throughout the years, but what they had in common, besides the genre, was that they both starred Lea Thompson and in both films, she was involved in quite disturbing romances.
Granted Lorraine didn't know Marty was her son and Howard was an 'anthropomorphic' duck; it's quite difficult to overlook the Oedipal and 'interspecial' undertones of each relationship... regardless of your personal appreciation of each film.
Which of these two romances, culminating with one cringe-worthy kiss, was the most disturbing?
After voting, you might discuss the list here