As a woman there can be a lot of pressure to stay in good shape. Every girl wants to look their absolute best and a lot of us just want to stay healthy. Jogging is a great way in the morning to get that work out started but if you have big boobs, you could end up with two black eyes. Having a small chest means not worrying about your boobs when you run. They dont bounce so much and theres no extra weight on the front of your body. Knowing you can run and not knock your teeth out is a great feeling.