When did it become socially unacceptable not to wear a bra and how

History of bras - Wikipedia

Do you ever wish that bras were never invented, or that they were better designed? - Quora

Why is it socially unacceptable for a woman to not wear a bra in public? - Quora

The Internet Says a Red Bra Will Disappear Under a White Tee. Not Necessarily.

Social Narrative: Wearing a Bra: Editable (Printable PDF ) – AdaptEd 4 Special Ed, Inc.

Why is it socially unacceptable for a woman to not wear a bra in public? - Quora

In what countries is it a norm for women to not wear a bra? - Quora

Training bra - Wikipedia

I'm 64 and never wear a bra — trolls think it's weird but I'm proud

Why is it socially unacceptable for a woman to not wear a bra in public? - Quora

Side Effects of Wearing Very Tight Bra's