23 male dating a 16 year old female illegal?

Illinois

Is it illegal for a 23 year old male to date a 16 year old female, when there is no sexually activity going on?

As long as no sexual contact occurs and the parents of the 16 year old consent to the dating relationship it is legal. Sexual contact between a 23 year old and a 16 year old would be a violation of state law in Illinois. The age at which a minor can consent to sexual contact is 17.