A study found young men think about sex about 19 times per day (as compared to young women who think about it 10 times daily). Despite it being on men's minds much of the time, men still remain confused about what great sex is, and how to have it. Men face both mental barriers to physical barriers to great sex. They may be plagued with self-doubt, and cling to myths and misperceptions about sex. Physically, many men could use some work on the mechanics of lovemaking.