Sounds about right
When I was a senior, most seniors were 18, a few like me were 17 and a few were 19 because they started school a year late. I started a year Early. So in some of my classes I may have been sitting next to a 19 year old. And trust me, you could tell no difference between the 17, 18 and 19 year old students.
It's ok if a 16 year old girl gets gangbanged by the whole defensive line of the football team at her high school. She's perfectly mature enough and capable enough to decide what to do with her body.
What?? What's that??? Can she hold hands with a 30 year old???? What are you some type of creep?? She's not mature yet! The brain doesn't mature until 25....she doesn't have any life experience!