By this reasoning a 21-year old also cannot consent to sex with another 21-year old, or indeed, can consent to anything else. You're correct that human brains a

By this reasoning a 21-year old also cannot consent to sex with another 21-year old, or indeed, can consent to anything else. You're correct that human brains aren't fully developed until the age of 25 or so, but that doesn't mean humans are blubbering morons who can't consent to anything before that age. Also it's not at all established that anything actually happened with Minsky; from the testimony it's only clear that she "was directed" to have sex with Minsky, but not that any sexual activity took place. Given that she was clear about this in other cases, it seems that nothing happened.