Because some states have stupid laws?
Consider Pennsylvania, which has a democratic legislature. In the state of PA, consent laws for sexual relations extend all the down to 13-years old.
- Anyone under 13-years old cannot consent to sexual activity with anyone of any age
- Anyone ages 13-15 can consent to sexual activity with someone that is no more than 4 years older than them
- A 13-year old can consent with a 17-year old
- A 14-year old can consent with an 18-year old
- A 15-year old can consent with a 19-year old
- A 16-year old can consent with any age.
Why is the PA law like this? So that high-school romances don't end up with one person being labeled a sex-offender or a rapist for their entire life.
These PA laws are particularly interesting because in 2020, Governor Wolf signed into law HB 360, which set the minimum age for marriage at 18 in the state. Prior to that being enacted, you could marry at 16 with parental consent and even marry under the age of 16 with court approval. Therefore until HB 360 was enacted just 3 years ago, PA had no minimum age for marriage.
So in PA, you can legally consent to sex at age 13 (as long as your partner isn't more than 4 years older than you), but you can't get married until you're 18.