The human body has thousands of touch receptors. The fingertips and tongue may have as many as per cm 2. There are a lot of factors that cause sex to feel good. But no, they are present, even in childhood.

Adolescent sexuality is a stage of human development in which adolescents experience and explore sexual feelings. Interest in sexuality intensifies during the onset of puberty , and sexuality is often a vital aspect of teenagers' lives. Sexual interest among adolescents, as among adults, can vary greatly, and is influenced by cultural norms and mores , sex education , as well as comprehensive sexuality education provided, sexual orientation , and social controls such as age-of-consent laws. Sexual activity in general is associated with various risks. Contraceptives specifically reduce the chance of pregnancy.

Sex is confusing. Chances are, whether you're about to embark on your first experience with sex, or you've done it multiple times, you probably still have a ton of questions. What's sex really like?

The same reason you, most people, and I do. For teens specifically, it's because for most of human history people were just another creature in the natural world, and in that scenario most people will be dead by the time they reach The problem is that one of big factors that help social animals like humans survive in the unforgiving "Satans Church" world that is nature is the existence of grandparents. Once the first generation is around to help the next two do things like find sources of food or pass along ways to avoid short faced bears it increases the odds of survival for everyone. Because of this evolution and natural selection made it so that around the ages of humans have an explosion of hormones which causes an almost overwhelming desire to reproduce.