OK, here's my two cents. People have a natural attraction to the shape of other humans. In general, anything that gets in the way of that shape, well, it gets in the way of viewing and appreciating that natural shape. If you ask lots of women and men about what they prefer, they gravitate towards natural beauty. Ask women if they want their guy to take steroids and look like Arnold and most will say no. Ask men their preferences and most will tell you they prefer less (not more) makeup, natural eyebrows (not deforested), natural (not silicone) breasts, and especially brafree shape (and not a uniboob high on the chest). Perhaps the natural shape of brafree breasts is more visible without buttons, pockets, etc. Sweaters are often relatively form-fitting, and better at letting natural beauty be seen and appreciated.