A lot of men really hate seeing women succeed. If a woman posts a photo or shares an achievement online, the male response is often strikingly hostile.

When a woman posts something positive—“I graduated,” “I accomplished sometime,” “I reached a major career milestone”—she will often receive dozens, sometimes hundreds, of hurtful comments. You rarely see the same dynamic when a man posts an equivalent achievement. If a man says he graduated, got a promotion, or reached a new fitness goal, you don’t see waves of mean-spirited replies from women.

That isn’t to say men are never criticized by women online. They are—but typically not for accomplishments. When women do attack a man, it’s usually in response to something negative or contentious: a screenshot of a message he sent, something he said to a partner, or behavior perceived as unethical or cruel. It’s not aimed at the fact that he succeeded.

Certain men react negatively to female success itself. It isn’t the post that provokes hostility so much as the visibility of a woman doing well.