Shyness

"It is said that whenever a new model appeared uneasy at being photographed, the Baron would strip off his own clothes, don the leopard-skin, and together they would gambol about like young animal pups until the model lost his shyness."

Rictor Norton, The Beginnings of Beefcake Or, The Origins of the Male Nude in Photography

http://rictornorton.co.uk/beefcake.htm