My breasts moved to much. Too much breathing and such. LoL But the shirt says "Does this shirt make my boobs look big?" like anyone really cares what is written on my shirt. LoL
I always read women's t shirts even if they are small boobed. If accused of staring at their boobs I can say I was reading and it's true!
On another note, I am unsure if there is a thing such as breasts moving too much.