Thank you very much for your answers and advice. I've been quite busy with work lately and haven't been on the forum often.
As for the advice, I completely agree with you. A bra tames your breasts. Especially for those of us who have larger breasts and which move around a lot due to their size. At a certain size, this limit of breast visibility is more noticeable when not wearing a bra than when wearing one. Also, an alternative could be a compression undershirt or a sports bra. Personally, such clothing irritates me, i.e. tightens and is uncomfortable. So a bra may be the only option.