Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: Are you happy in your job? > Health-in-Motion 31 May 2016 Manogamy The questions of why most humans choose to be monogamous has puzzled generations of anthropologists. The majority of animal species are, after all, naturally promiscuous. The answer may lie in the threat of sexually transmitted diseases, which were rather widespread in many prehistoric societies, resulting in plummeting reproduction rates that convinced our forebears that mating for life was the healthiest way to proceed. Many communities probably made the switch to socially imposed monogamy when they developed the agricultural techniques that allowed for the establishment larger towns and cities. 0 More in Newsletters Everyone needs a good eight hours of sleep per night, right? More: Daily Dose: Are you happy in your job?Health-in-Motion advertisement Other news News SURVEY: Are you happy in your job? Medical Statins aren't the only way to lower cholesterol Medical 'Spare tyre' worse for your heart than 'love handles' Medical SEE: 6 questions about rabies answered Medical Foetal alcohol syndrome is preventable, but not reversible Medical 'Listen to your gut' to help prevent colon cancer From our sponsors How to still have a good life with diabetes Eye-Q: R50 off! Lose weight Otrivin Menthol relieves sinus congestion Live healthier Love coffee? Your heart may too » What to eat for white teeth Bad foods for teeth-whitening Do any of these drinks cause your teeth to hurt? Savour your coffee – with a bright smile Here's how to stop coffee from staining your teeth while enjoying all its health benefits. Get your groove back! » Get your move on! Morning run? 5 exercises to start your summer fitness regime 6 easy ways to make your workout fun again Some inspiration to make sure your workout routine don't become tedious.