Why is it that even though my boobs are growing, they only get real sensitive in the evening after work? During the day i can feel the slight mass move and jostle around but no real sensitivity. When I get home though it's a different story, they buzz from the nipple to deep inside the boob.
Has anyone had the same happen to them?

Is it gravity, When i were a bra all day all my bits are kept in place and it feels as if no change happens during the day. The bra stops any rubbing of the breast onto my shirts.
On a no bra day first thing in the am and up to late afternoon i can feel them move and bounce and they start to sag down and pull more onto my shirt making them feel more sensitive as they rub onto the fabric of the top i am wearing.
I am only an A cup but the nipple still show more at night as it gets worked up to enjoy life, the bra seems to stop this from happening.

Maybe we tend to feel more physical sensations when we relax.