RE : " heard that u don't have to wear all the time after u get implants but would that not cause them to sag sooner? Or will it matter much?"
The breast a a sag-prone organ. Despite all the care in the world the beautiful, perky breasts of a 20 year old will not bed there at age 50 because no human has ever beaten Gravity and aging. Similarly, gravitational pull is greater on heavier objects. As such, heavier / larger breasts will sag sooner than lighter, non-weighted down breasts. Put another way, an augmented breast will sag quicker than a non-augmented breast.
As a result, using a well fitted bra will help you combat gravity. The longer you wear it, the longer you will put off the inevitable sagging.
Dr. Peter A Aldea