But can they consent with other children? That's the window that has opened for adults: our society accepts - promotes - fornication among ever-younger adolescents.
This means we posit that they can "make informed decisions and consent" - otherwise, we'd be obliged to attempt to stop them by various reasonable means. The camel then has his nose in the tent. If you accept 14-with-14, then objecting to 45-with-14 is just a matter of taste.
Many FReepers say no big deal if a 14, 15 or 16 year boy has sex with an adult...teacher. Happens every “Bad Teacher” thread.