Health Check: how often do people have sex?

Australians report having sex once or twice a week, on average. For Brits, it's less than once a week, while Americans report having sex two to three times a week. We can’t know for sure how often individuals actually have sex. Some people may incorrectly report their sexual frequency, either by mistake or on purpose. But the national estimates data are based on representative samples, so they’re a useful guide. What do we mean by sex? Some studies simply ask participants how often they "have sex"; others define it specifically, such as "activity with another person that involves genital contact and sexual excitement".