In art school, I somehow managed to have life drawing as my first class of the day for several years. This, before I had taken to drinking coffee, was met with bleary-eyed angst. The human body is a complex form full of unique details and markers. Starting at 8 AM and lasting 3 hours, I wasn't always up for the task of studying flesh. Sometimes, not consistently, there was drapery available.
(Attributed to) Leonardo da Vinci, Study for a Seated Figure c.1470-1484
Domenico Ghirlandaio, Study of Garments c.1491
Albrecht Durer, Study on the Garment of God the Father c. 1508
Imogen Cunningham, The Unmade Bed c. 1957