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[Update: A post on female misogynists is now available.]

The misogynists. You may have heard of them. But what you may not realize is that they can be anywhere around you. They are notoriously hard to spot. They do not come with a label attached, and they may even come across as pro-woman.

In most cases, misogynists do not even know that they hate women. Misogyny is typically an hatred that men form early in life, often as a result of a involving a female figure they trusted. An abusive or negligent mother, sister, teacher or girlfriend can plant a seed deep down in their brain’s subcortical matter.

Once planted, this seed will germinate and begin to grow, the tiny root working its way into the processing and areas of the brain as its tiny stem works its way into frontal areas of the brain, affecting emotion and rational .

The first signs of misogyny are barely noticeable, but with additional exposure to neglect, abuse, or lack of treatment, this behavioral seeding will grow larger and more prominent. But even when the misogyny reaches maturity and the tendency toward acting with hatred toward women can no longer be controlled, the misogynist and the women around him will often fail to notice the condition until it’s too late.

The following traits are typical of the misogynist:

He will zero in on a woman and choose her as his target. Her natural defenses may be down because he’s flirtatious, exciting, fun, and at first. As time goes on, he begins to reveal a Jekyll & Hyde . He may change quickly from irresistible to rude, and from rude back to irresistible. He will make promises to women and often fail to keep them. With men, on the other hand, he will almost always keep his word. He will be late for appointments and dates with women, but be quite punctual with men. His behavior toward women in general is grandiose, cocky, controlling, and self-centered. He is extremely competitive, especially with women. If a woman does better than him socially or professionally, he feels terrible. If a man does better, he may have mixed feelings about it but he is able to look at the situation objectively. He will unknowingly treat women differently from men in workplace and social settings, allowing men various liberties for which he will criticize female colleagues or friends. He will be prepared (unconsciously) to use anything within his power to make women feel miserable. He may demand or withhold sex in his relationships, make jokes about women or put them down in public, “borrow” their ideas in professional contexts without giving them credit, or borrow money from them without paying them back. On a date, he will treat a woman the opposite of how she prefers. If she is an old-style lady who prefers a "gentleman" who holds the door for her, orders for both and pays for the meal, he will treat her like one of his male buddies, order for himself, and let her pay for the whole meal if she offers (and sometimes even if she doesn’t). If she is a more independent type who prefers to order her own meal and pay for herself, he will rudely order for both and pay the check while she goes to the bathroom. Sexually, he likes to control women and gives little or no to their sexual pleasure. Foreplay, if it occurs at all, is only a necessary means to an end. He likes oral sex but only as a recipient. His favorite positions enable him to avoid looking the woman in her eyes. He will women he is or in a relationship with. is the last thing he feels he owes a woman. He may suddenly disappear from a relationship without ending it, but may come back three months later with an explanation designed to lure the woman back in.

Only rarely will a misogynist possess every one of these traits, which makes it harder to identify them. Their ability to lure women in with their charm and charisma adds to the difficulty of spotting the early-warning signs.

Women haters (unconsciously) get off on treating women badly. Every time they can put down a woman or hurt her feelings, they unconsciously feel good because deep down in their hidden brain, their bad behavior is rewarded with a dose of the pleasure chemical —which makes them want to repeat the behavior again and again.

Berit Brogaard is the author of On Romantic Love