Hi Real,
Hokkien call it "buay"...hehehehe...my hanyu pinying v bad...pls pardon me.
You are suppose to tell the throw the wodden thing before u even draw yr lot to ask for permission to draw a lot.U have to tell the godness yr date of birth, address,name and etc.
If throw 3 times, all not agreeable, come back another day.( cos sometime we may be even to vex to really concentrate on what we want to ask or thing may have a turn).
If agreeable, proceed to draw the lot.Like u mentioned, if for a matter after 3 times, then i think it a sign for u to decide on yourself or go back another day.No pt to force an answer out.