Most STDs cause infertility, making it impossible ever to have children. A majority of teenagers who have sex are infected with an STD.<ref>4 out of 10 teenagers are sexually active; over half of this 40% (25% of all teenagers) have an STD.[http://host.madison.com/ct/news/local/health_med_fit/article_96d0ee57-e3dc-59d7-a5ec-e5cbc5b71ffc.html]</ref> | Most STDs cause infertility, making it impossible ever to have children. A majority of teenagers who have sex are infected with an STD.<ref>4 out of 10 teenagers are sexually active; over half of this 40% (25% of all teenagers) have an STD.[http://host.madison.com/ct/news/local/health_med_fit/article_96d0ee57-e3dc-59d7-a5ec-e5cbc5b71ffc.html]</ref> |