To offset the recent decline in birth rates, many governments have issued laws that everybody above the age of twenty has to carry a "Love Finder". This device matches them with potential partners based on compatible DNA in order to produce more offspring. When a match is found, law requires them to have procreative sex, or face severe consequences.
Sometimes it is a match made in heaven, sometimes it seems like a cruel joke, and sometimes it turns out hotter than anyone could imagine! But in the end, there is always lots of steamy, dirty sex!