in one's birthday suit

Nudism first caught on in the United States 90 years ago, brought over by German immigrants who believed the best way to commune with nature was in one’s birthday suit.

Nudism first caught on in the United States 90 years ago, brought over by German immigrants who believed the best way to commune with nature was in one’s birthday suit.

In Los Angeles, however, it’s illegal to bask in the sun in one’s birthday suit.