Its not right that we label 18-19 year olds as full blown adults and 15-17 year old as kids who can't consent. 15-19 year old are in the same developmental process and everyone is at different maturity levels. To say that a 18 year old is a sex offender bc they're dating a 16 year old is flawed. Same with a 17 and 19 year old and a 15 and 18 year old. Some 18- 19 year olds are still in high school or just graduated from high school. They still have friends in highschool. Adulthood do no come overnight. They're still the same kid they were the day before they turned 18. And not every 15 -17 year old is incapable of thinking for themselves. If they are what makes you think they'll magically be ready to think for themselves at 18-20?