is it illegal for a 16 almost 17 yr old 2 have sex with a 23yr old.

According to Pennsylvania Statutes, a person can no longer become a victim of statutory rape upon reaching the age of 16. The 23 year old could not be charged with Statutory Sexual Assault 3122.1 for having sexual contact with a 16 year old; however, there may be other legal concerns depending on the situation and the parents of the minor. If parents object to the relationship, they may be within their parental rights and authority to use legal means to prevent the relationship from continuing.