That's not to say you can't rock them with a professional-looking shirt ... of thumb is to treat shorts like skirts. If a skirt of the same length would be deemed too short, skip those shorts.

Hemlines were sky-high at Gucci’s Milan Fashion Week show, solidifying the trend for super short shorts ... up of a pencil skirt and a daring red zip-up jacket with no shirt underneath.

The 30-year-old posted an old clip of herself wearing a white mini-skirt and questioning whether it was too short to wear to work. She then answered her question. “Yes, it is far too short!

The untucked shirt loses more heat. And if the wearers stepped into a short-sleeved shirt and shorts, they could withstand an ambient temperature 6.7 degrees higher. That’s the shorts effect.