Ah, sorry - I read it as age of consent.
It's usually weird to have a very large age gap. I think it is a feminist issue in that 'older man, younger woman' represents in microcosm the issues of power, wealth, control, etc, etc, that are representative of patriarchy as a whole. And of course, we all know how 'older woman, younger man' is derided and belittled.
But that's just my opinion, even though it does seem to be shared by a large section of society (although the wider public seem to just find it icky rather than a feminist issue). Age is just one more factor in the good/bad relationship lottery. It's up to the individual to decide for themselves what is acceptable, though I would hope that parents, friends, whoever would voice concerns to the individuals concerned if they thought the relationship was exploitative due to age, just as they would if it was down to other behaviours and factors.
And the initial example was a young girl who just wants a boyfriend with a car. The state can't legislate against that! But sex - well, sex can have dangerous and damaging consequences that are loaded towards women. The state should legislate against that.
My issue is more with the 'she looked sixteen!' as a magic bullet used to exculpate damaging sexual situations, as well as rape. Someone who cared would make damn sure that their partner was sixteen. Someone who cared would wait until it had been properly established. This whole 'well I had to have sex right then and there, and she said she was sixteen and she had make-up on, and that's all the evidence I need', is weak, laughable, and ridiculous, and should be slung out of every situation in which is it used as justification.
Why are my posts always so long! Sorry to all.