Here's our handle on hissing: Cats hiss to let you know something has made them unhappy.Your reaction may be to approach or reprove the cat, but his hissing action should override your impulse.
"Use of force is justified when a person reasonably believes that it is necessary for the defense of oneself or another against the immediate use of unlawful force." Intimidation may be employed consciously or unconsciously, and a percentage of people who employ it consciously may do so as the result of selfishly rationalized notions of its appropriation, utility or self-empowerment.
He may seem almost comical to you, with that usually serene feline face contorted into an open-mouthed sneer as his ears flatten, back arches and tail fluffs out in a poufy plume.
The hissing sound and posture is far from funny to your cat, though, because a cat that hisses is in defensive mode.
After a woman breaks-up from a controlling partner, he may send her gifts, such as jewellery and flowers, with a card saying, “Sorry, I love you.” To someone who has lived with ongoing coercive control by this man, the gift and the message means something threatening to her, for example, the unwelcome gift and message may mean he will try every tactic possible to manipulate his way back in; or he knows my every move; or there is no escape; or I am unsafe.
It is important for the victim of symbolic aggression to trust their gut instinct about what they view the tactics to mean, and to do whatever it takes to keep themselves, and their children if they have any, safe.