Member's Responsibilities Include Knowing the Proper Way to Make a Motion. The chair calls on the member. Motions should be concise, yet complete. This is the motion to be voted upon. Wait for a second to the motion, if needed.
Many people begin a motion by giving all the history, the reasons, etc.
If you don't do this, members will not know what they are being asked to vote on. I'm sure everyone has been in a situation where the chair of the meeting called for a vote and you were not quite sure of the exact wording. The Chair states the motion so everyone knows what is being discussed and what will be voted on. After the motion is seconded and restated by the Chair, THEN you may speak to your motion, giving the reasons why it should be passed. There is no problem with this since the motion will be voted on at the meeting.