People are more sexually adventurous right now — and more cautious

On an unassuming Saturday night in June, I stepped into a scene inspired by Eyes Wide Shut: masquerade masks, attendees in various states of dress, and flowing alcohol poured by a half-naked bartender.

This was a sex party hosted by Snctm, an "exclusive" members-only sex club. While the night was a mix of cocktail-hour chatter...