Guys are some of the best candidates for laser, actually. Male back hair is typically coarse, dark, and dense, which absorbs the laser energy perfectly. It often works faster on men than on women with fine, light hair. However, it can hurt a bit more because the roots are thicker. Expect a full back session to take anywhere from 45 minutes to an hour. Regarding feeling self-conscious, don't worry. Professional clinics see bodies of all types all day long. They are completely clinical about it. They will just drape the areas you aren't treating and focus on the job. The cost is usually based on area size, not gender, so a 'large area' (back) costs the same for a man or a woman.