不由自主

Explanation: Can not help themselves, unable to control themselves. 　　Usage: And language style; as predicate, adverbial; for human 　　Source: Qing Cao Xueqin's "Dream of Red Mansions" 81 back: "I do not quite remember. Danjue his body involuntarily, inverted image any person, tugging back and forth, asking me to kill to do." 　　Examples: I do not quite remember, Danjue his body ~, inverted image any person, tugging back and forth, asking me to kill to do. (Qing Cao Xueqin's "Dream of Red Mansions," the eighty-first back) 　　Riddle: Arranged marriages; the ship without rudder Thesaurus:  lose self-control