Promiscuity or promiscuousness: having or characterized by many transient sexual relationships; demonstrating or implying an undiscriminating or unselective approach; indiscriminate or casual; adulterine or libertine; epicene.
It's considered the opposite of chastity, and may be reclaimed by polyerosous, or otherwise nonmonoerosous, individuals. Note that some use this in a moralist way through condemning glances.
Skinny Dipper Flag
The Skinny Dipper Flag was designed to inform people that they're about enter an area where there will be social nudity.
The yellow on top represents the sun and the heat.
The blue represents the sky around the sun and the water below.
Light Sleeper (Paul Schrader, 1992)