Your motion must relate to the business at hand and be presented at the right time. Some motions are so important that the speaker may be interrupted to make them. The original speaker regains the floor after the interruption has been attended to. A second indicates that another member would like to consider your motion. It prevents spending time on a question which interests only one person.
Parliamentary procedure guards the right to free and full debate on most motions.
Some privileged and incidental motions are not debatable. Some motions can be altered by striking out, inserting, or by doing both at once. The move to reconsider must come from the winning side.