Scientists suggest that daylight may have more of an effect on sperm quality than lifestyle choices. Find out more by going to: http://www.dailymail.co.uk/news/article-2649047/How-long-days-summer-damage-sperm-booze-smoking-NOT-harmful.html
Similar article also covered by the Telegraph (Sarah Knapton) 5th June, 2014 – http://www.telegraph.co.uk/science/science-news/10876162/Summer-loving-may-not-be-recipe-for-getting-pregnant-study-finds.html