There are no laws that prohibit a parent from giving permission or consent to dating between two teens or between an adult and a teen. Parents have every right to give there consent for their child to date. However, where sexual contact is prohibited by law, a parent does not have the authority to subvert state laws by encouraging, or condoning sexual contact between their child and another person. The same thing applies to all laws. A parent does not have the authority to encourage or condone actions or behaviors of a minor child if those actions violate local, state or federal laws. If a parent told their minor child, it's ok to go out and rob a house, would that be ok just because the parent gave their consent? It's the same thing with statutory rape laws.

The laws are there to protect the minor child even if it means protecting them from their parent. If a child is underage, there are also laws that say they can't be married without parental consent and in most states, that process involves having a parent go before a judge to get approval for an underage minor to be married. Generally, this is an emancipation of the minor that legally forfeits the "minor" status making them legally an adult and subject to adult laws. Basically, if kids want to play like adults, they have to be subject and accountable to the adult criminal justice system or their parents could be held accountable. As a minor, you are not subject to the same justice system as adults unless a court says so.