A YouGov survey of 2,000 adults found sex was the most popular free activity, ahead of window shopping and gossiping.
The Scots were most amorous with 43% choosing sex over other pastimes, compared with 35% in South England.
Aids charity the Terrence Higgins Trust, which published the survey, also welcomed recent figures showing an increase in condom sales.
Around one in 10 respondents to the survey, carried in November, said their favourite free activity was window shopping and 6% chose going to a museum as the cheapest way to pass the time.
But the sexes differed on their priorities, with women preferring to gossip with friends while men had sex firmly at the top of their list.
December 01, 2008
One Way People Are Passing The Time
Is anyone really surprised by this story from the BBC: