You can't tell her that joke—she's much too prim and proper.

你可别跟她讲那个笑话，她这个人古板正经得要命。

《牛津词典》

Sometimes I think you joke too much.

有时候你玩笑开得太过火了。

youdao

Timing: Apt timing is as important as surprise, because if you give the brain too much time to work out a situation or joke, the funny moment will pass by.

把握时机：时机把握和“出其不意”同样重要，因为大脑如果有很多时间对一个情景或者笑话做出反应，有趣的瞬间就会溜走。

youdao