What percentage of couples are in the lifestyle?
Estimates vary widely because most lifestyle participants are deeply discreet, but published research and large platform surveys consistently put the active US swinger population at roughly 4–6% of married or partnered adults — several million couples. A larger fraction (often estimated at 15–20%) report being "lifestyle-curious" or having had at least one non-monogamous experience. The lifestyle skews disproportionately mid-career, mid-30s through 60s, and is more evenly distributed geographically than the major metro stereotypes suggest.