Nicolas Ungemuth, a Parisian observer, has lamented the increasingly relaxed standards of dress on public transportation. He specifically cited the wearing of flip-flops on the metro as a prime example of worsening “visual aggression.” Ungemuth’s observation reflects a broader concern about declining decorum and comfort levels during commutes. He questions whether swimwear will soon become acceptable attire. The commentary highlights the sensory discomfort experienced by passengers, including unpleasant odors alongside visual disturbances. This critique taps into ongoing debates about social norms and public space etiquette in urban environments. The piece suggests a growing sense of frustration with the perceived erosion of standards on Parisian public transport.