The make you breasts look bigger but they do not make your breasts grow bigger.
To get bigger and firmer breasts, you need to go for a breast augmentation.
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Usually women breasts shape is not the same. One of them is bigger than other.
To hold up their breasts and make them look bigger.
If you are a boy, look at yours, now imagine that about 10 times bigger.
You can't make them bigger but you can make them look bigger by stuffing the bra or wear a push up.
Wrestlers have well developed pectoralis major muscles. These muscle are placed behind the breasts. That makes the apparent size of the breasts look bigger.
Your breasts are "shrinking" because you are losing fat. They will look bigger if you gain muscle. Try the fly machine.
HAHAHAHAHAHAHAHAH. They have smaller bodies, so their boobs look bigger and unproportional. (:
to make your boobs look bigger you could try stuffing your bra with tissue x
you can use "chicken fillets", they are basically rubbery bra inserts that make your breasts look bigger! or you can use push up bras or push up inserts, or just use tissue, but that doesn't work as well as the other 2