Lub qhov rooj khiav ceev yog qhov yuav tsum muaj rau kev nyab xeeb ntawm hluav taws ntawm lub tsev, thiab nws yog lub qhov rooj rau kev khiav ceev ceev ntawm kev khiav ceev thiab kev tua hluav taws. Thaum muaj xwm txheej xws li hluav taws kub tshwm sim nyob rau hauv qhov chaw kaw, tib neeg yuav subconsciously khiav ntawm qhov nkag thiab tawm, yog li lub qhov rooj khiav ceev yuav tsum muaj cov cim qhia kev nyab xeeb.