If you shave chest and back does it grow back thicker?

Answer 1

In reality it doesn't grow back "thicker" but it looks this way. The hair on your body grows in cycles - it will grow and when it reaches a certain length will fall out and begin to grow again from the follicle. At any one time you will have all the different cycles on hairs on your chest - some will be long, some will be short and growing, and some will not be there because they have just fallen out. When you shave your hair, it is then all the same length (there will be no long ones and short ones) and will grow back at the same time and therefore LOOK thicker.