Teenagers are not adults. Brains and bodies aren’t fully mature until one’s early 20s and oftentimes babies born to teen mothers have be cared for by grandmothers because the teens simply don’t have the maturity. And will reject the responsibility of caring for a baby. When an adult man pursues a relationship with a girl younger than 22 or so for the purpose of sex, he’s just taking advantage of her curiosity about sex or need for security. Stop rationalizing bad behavior- the facts aren’t on your side.