I don’t think it will be long before two people, a 10 year old girl, and a 25 year old guy stand before a judge and declare their lover for each other. The judge then takes the enthralled-girl aside and she says the same.
...at that point the judge will have NO CHOICE but to approve the marriage.
That’s where this crap leads.
Once a society abandons Christian morality, there is no logical moral criterion for any sexual activity other than consent. Not “consenting adult,” because that falls apart with the first hookup between teenagers. Not “informed consent”: they got rid of that in aid of the abortion license and organ donation.
Just “consent,” identified as the absence of immediate physical coercion.