§ 3123 Involuntary deviate sexual intercourse (7) who is less than 16 years of age and the person is four or more years older than the complainant and the complainant and person are not married to each other.
When the alleged victim is 16 or older and less than 18 years of age, and the alleged offender is over the age of 18, the Commonwealth may charge the offense of corruption of minors or unlawful contact with a minor, even if the activity was consensual: § 6301 Corruption of minors.
Your 18-year-old son is dating a 16-year-old female classmate – no big deal, right?
A two-year age difference isn’t particularly alarming, and dating is fairly standard at that age.
By 1920 ages of consent generally rose to 16-18 and small adjustments to these laws occurred after 1920. From 2005 onwards states have started to enact Jessica's Law statutes, which provide for lengthy penalties (often a mandatory minimum sentence of 25 years in prison and lifetime electronic monitoring) for the most aggravated forms of child sexual abuse (usually of a child under age 12). Louisiana, the Supreme Court of the United States ruled that the death penalty for rape of a child was unconstitutional.