Snake Eyes 2 (1987)

Crazy jealous ad executive David has finally gone and done it. With suspicion, infidelity and his own raging guilt, he has pushed his loving wife away and into the arms of a macho cop. Now he is a man possessed by sexual daydreams he can't distinguish from reality. And to make matters worse, after each one, there always seems to be some indication that it was not all fantasy.

Horror, Fantasy