If your date is below the legal age of consent, you could be charged with statutory rape, even if the sex is consensual.
If underage dating involves sexual intercourse, state statutory rape laws apply.
If both people are 18 or older, then there is nothing to be concerned about because 18 generally is considered to be the age of an adult, legally speaking.
Several laws can affect relationships when age is a factor, and these laws often are established by states or municipalities.
Even for states with a single age of consent, there may be exceptions.For example, in Iowa a person may consent to sex at age 14 provided their partner is no more than 48 months older.