I have a neighbour who gets on my tits because almost every time she opens her mouth she manages to say something that I find either ridiculous, or offensive, or just depressing. Sadly, she insists on giving me the benefit of her wisdom on everything, and I have no means of escape. Anyhow, this was the latest:
(background info, we both have 12/13 year olds, hers is a girl, mine a boy, they spend quite a bit of time hanging out, (often alone) and get along great, no crush on either side - just mates. This week, the girl turned up at my house with two lads from her school, they came in, and all hung out at mine for an hour or so, and it all seemed perfectly harmless, then my neighbour arrived)
Annoying woman 'Oh, I see you've got Ben and Dave from round the corner here. Lucy has been hanging around with them quite a bit lately. I'm not happy about it at all. She asked if she could go back to Ben's house with them both this afternoon, but his parents are still out at work so I said NO WAY! I am not having that. I know what those boys are like! And look at her! She looks so mature and well developed for her age, I can just imagine what those boys will be thinking....'
(actually she really doesn't look that grown up, or that gorgeous - she just looks like any slightly skinny, spotty, average 12/13 yo. The woman is obsessed with the idea that all males are in love with her daughter, and that she looks like a 25 yo movie star.
)
Her '.... and anyway, the boys are like bees round a honeypot. All of them. There is no way I'm having her going in there with no adult home - especially not while there are two of them! Oh no! I know what boys of that age are like! Trying to get her on her own! That Ben especially, I hear all sorts about him - who he has taken to the pictures, who he has been kissing....
Me Er...what's the problem? Surely it's safer and more innocent if there are three of them? It means they are just a group of mates, hanging out. I could understand your reluctance if it was two couples - or just her and one boy, but otherwise it all sounds pretty innocent to me.
Annoying woman Oh you are being naive. You don't know what these kids are like. I've worked in secondary schools. Loads of them are shagging all over the place, egging one another on.
Me What, at 12?
Her Yes! you can't trust these boys at all. They are obsessed with it.
Me Well, I am sure that some are sexually active at 12, but it is by no means 'normal' at that age, and surely providing you trust her not to be shagging at 12, then you don't need to worry, do you? So do you trust her?
Her Oh god, yes! Of course I do, it's just that, you know....it's a bit dodgy with two of them, and her on her own....
Me What are you saying exactly? Do you think these boys will sexually attack her?
What on earth makes you think that? I am the mother of a 12 year old boy too remember! I take offence at the idea that boys of 12 cannot be trusted to be around a girl without wanting to assault her FFS, just because they are boys! 
Anyway, she tried to back-pedal a bit, and of course I realise that things can and do get out of hand sometimes with early teenaged sexual encounters, and I am well aware that girls often get groped without their permission, or pressured into sex. I know that. But I felt furious at the idea that just by dint of being a girl, her child was automatically cast as some innocent precious thing who was bound to be exploited/ compromised/harmed, while the boys were assumed to be dangerous, cynical, untrustworthy sexual predators at TWELVE YEAR OLD just because they were boys!!! 
I don't know why I am wasting so much time fretting over it - the woman is a fucking nutjob on so many levels - but I just feel really angry about it, days later. 