Just because she isn't ready for the actual sinful acts and hasn't actually committed any yet, doesn't mean she can't protest against them being considered sins. I do appreciate that there is a difference between 'lesbian sex is a sin' and 'being a lesbian is a sin' and that most Christian churches believe the former but not the latter. But nevertheless, if the church's position is 'your straight friends will be allowed to have physical relationships with the people they love when the time is right without it being a sin, and you will not', she obviously does have something to complain about.
Which, of course, doesn't mean that the church has to agree with it. By the way, genuine question, which I can't easily find the answer to: would the Church qualify kissing (the kind involving tongues, obviously) as a sexual and sinful act?
You realize you said this in reply to a paragraph where I wasn't even talking about sex, right? Talking about people being straight or gay is not automatically 'talking about sex', it's just talking about romantic relationships. That's perfectly compatible with the usual explanations for children on relationships and on how children are made.
The 'should' part was a personal opinion which I wouldn't want to force on people. But while I could sympathize with parents complaining about their children having been unexpectedly exposed to a speech about sex, I can't say the same about the case where the speech is about gay or lesbian relationships or inclinations, without touching on sex.
I'm hardly saying we need to return to that, or that we should reduce the age of adulthood. Just that 12 year olds can certainly have the abilities to do and say meaningful things - maybe not as meaningful/valuable as what they or others can do and say as adults, but meaningful nevertheless.
Interesting, about the confirmation at 7. I'd never heard of that happening myself (in here we do have a religious ceremony at 7 or 8, but that's just the 'first communion', with confirmation following 4 years later). And my (very) quick check suggested that American parishes were more likely to go for confirmation at a higher age than our 12, than at a lower one. My bad.
As for the rest - you don't think it's a little ridiculous to state that a kid of 7 can be held responsible for their own sins, but a kid of 12 can't express any opinion worth listening to? Which, once again, isn't about this particular 12 year old or the validity of her speech.