Age: 28 Russia, Samara. Age: 46 Russia, Kaliningrad. Age: 24 Poland, Poznan. Age: 27 Poland, Warsaw. Age: 52 Russia, Novosibirsk.
If your chest does protrude, you should invest in a good binder to flatten it.
Binding your chest flattens it and gives you a masculine appearance. There are multiple types, so you must do some research and choose the binding methodology that suits you best.
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As a side point, binding yourself tightly for too long might be harmful because it causes rib and back pain.