MAK answered Monday June 18 2007, 7:26 pm: Yes, this is normal, but not healthy. The reason they hurt is because the tissues in your breasts bruise and sometimes even tear as they bounce up and down. The reason bras were invented was to protect the breasts from damage as you walk, run, and do other activities.
If you don't wear a bra (at all) for up to a month or so, your breasts will become alot less sensitive, but they will sag alot more.
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