1. Losing an erection fearhttp://www.medicalnewstoday.com/articles/284679.php
Several men suffer from the fear of impotence.The obsessional thoughts of losing pleasures simply ruin your happy moments. it's higher to think about her and build the best use of your time.
2. Fear about the sizehttp://www.dailymail.co.uk/femail/article-2507810/Over-half-women-wake-mood-partner--annoyed-DREAM-night.html
Several men concern about the scale of their penis. They assume the smaller size of penis makes them less manly, and an unhappy partner. And this fear born a biggest industry selling sake stuff to enlarge penis.