A teen with a teen in most places other than the South is typically deemed acceptable. It is the 45 year old and the teen that'd leads to the consent and abuse of authority problem. You can't license for 45 on teen sex.... I mean other than in Loren's imagination can you.
That is a good observation, and one that undercuts the whole "old enough to consent" argument. If she is old enough to consent to sex with somebody her own age, then why isn't she old enough to consent to sex with somebody much older? This is more the taboo of age disparity at work than anything to do with ability to consent. People are disgusted, so they search for an excuse to outlaw other than just saying they are disgusted.
Similar weird arguments are created about "Consent" when people argue for laws against beastiality. Apparently them humping you isn't consent, and apparently you need consent to have sex with them, but not to kill and eat them. It is the yuck factor at play here, and not anything to do with consent.
I am surprised the anti-gay people haven't come up with an argument against homosexuality based on "consent".