Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > 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: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Medical What you should know about the reversal of transvaginal mesh surgery News Thank you for caring Medical How to manage your IBS during the end-of-year festivities Parenting This common chemical may be tied to language delay in kids Medical Could herpes virus help cause Alzheimer's? News Which weight-loss surgery is best? From our sponsors Dementia and Incontinence: what you need to know Tell-tale signs you need a mattress upgrade Keen to win a R2 000 voucher? Good health begins in your gastrointestinal tract Live healthier Quit smoking » How to beat triggers that make you crave a cigarette You need to learn how to beat the behavioural, environmental and emotional triggers if you want to succeed in quitting smoking. Hygiene » Your showerhead may be bathing you in germs You probably think showering will wash away dirt and germs, but your showerhead might dump nasty bacteria on you instead that may cause lung infections.