go against the grain

If something goes against the grain, you would not usually do it because it would be unusual.

不正常，违反常理;与…格格不入

grain /greɪn/

n. 谷粒, 谷物, 谷类

小的硬粒

(天然)纹理

These days it goes against the grain to show too much respect for authority.

如今尊重权威反而不正常了。