Yes, they can date, as 16 YO is the age of consent in S.C. You cannot, however, exchange intimate photos, as ubder age 18 you could both be charged with possession and distribution of child pornography. The 20 YO could also be charged

Can a 21 year old date a 16 year old in South Carolina?

Statutes governing South Carolinas age of consent, associated criminal charges, available defenses, and penalties for conviction. In South Carolina, it is illegal for an adult (someone 18 or older) to have sex with a minor (someone younger than 15), even if the sex is consensual.

Can a 17 year old leave home in South Carolina?

Running away and leaving home is considered a status offense in South Carolina, which means if an adult ran away it would not be a misdemeanor or felony. Therefore, it is not a crime for a 17-year-old to run away from home.