Dating and minors
The laws vary from place to place, but typically someone over the age of 16 is safe. Florida State Statute: 794.05 Unlawful sexual activity with certain minors.-- (1) A person 24 years of age or older who engages in sexual activity with a person 16 or 17 years of age commits a felony of the second degree. There are laws regarding children being involved in sexual contact.
The minor must be at the age of consent for sexual contact to take place, which varies from state-to-state but is commonly 16.
(2) The provisions of this section do not apply to a person 16 or 17 years of age who has had the disabilities of nonage removed under chapter 743.
As used in this section, "sexual activity" means oral, anal, or vaginal penetration by, or union with, the sexual organ of another; however, sexual activity does not include an act done for a bona fide medical purpose.
There are no laws against dating so yes, if the minors parents agree.
One of the reasons for prohibiting drinking by minors is that this substance brings havoc to the cells of growing humans. It depends on the laws in the country or state that you are in.
Most places do not enforce the laws between consenting adults, but will add the charges in instances involving minors and criminal sexual conduct.
But if minors want to fool around with each other, that is not illegal (although some people will disapprove).
Also think about what the term "dating" really means.