Aside from the fairly obvious “is a high-powered state senator” angle; I’d be curious what the breakdown between “law enforcement doesn’t really take seriously” and “law enforcement thinks that getting the public to take seriously is difficult” is for child rapists whose taste run toward the higher end of the age range.
There’s no way the plea agreement says “with adolescent-age individuals” purely out of a desire to add more vague specificity to the document; that has to be there because at least one side of the plea deal arrangement thought it was important that it be there; whether it be the prosecution not wanting to sound like they were letting a baby raper off lightly or the defense wishing to avoid the impression that either the age or the prostitution were illegal; and it was just a teensy little edge case where the two at the same time were a compliance problem.