T-shirts were made for men who couldn't sew, replace buttons
A company in 1904 ran a magazine ad, showing 'before' and 'after' images of a man wearing an undershirt. While the 'before' photo showed a man wearing a garment with its flaps held together with safety pins, the 'after' photo showed a man wearing a 'bachelor undershirt'. The slogan read, "No safety pins- no buttons- no needle- no thread."