Naturists proved especially good as models

Naturists, or people who practice a clothes-optional lifestyle, proved especially good as models (this comfort I had learned only after long practice), because we did not need clothes to make us comfortable. 

To me, good modeling is a performing art that gains both from skill and
from practice; but we need to get comfortable with it before we can
begin.  I joined the Society of Models for Art and Education, started to
model at New York and New Jersey schools, wrote a short guide book for
models, and began teaching groups of models in various locations:  at
home, at naturist camps we attended and at schools in the New York