It would not be appropriate if the asker is a boy and is interested in younger boys sexually. In fact it is not appropriate for a girl either. You need to be interested in people your own age, or above the age of consent, in any sexual way.
It is normal. He has probably started puberty and eating more because he is growing quicker now. As long as he doesn't look fat around the middle then it's nothing to worry about.
Yes and 11 year old is a preteen.
That's not normal, but it is normal for people to be curious.
Yes, actually, 12 is the last year of a preteen. 10-12 is the ages of a preteen. When you're 13, you are a teenager.
Not only is it not normal it is impossible.
Tween and preteen is the same thing. It's an American neologism and marketing term for preteen and a blend of between and teen. So yes, a 12yo is a tween and a preteen.
Well, it's pretty normal for a 7 year-old girl to like boys. It's nothing to worry about. It's normal for them to start liking boys around that age.
yes, if you're under 13 your a preteen, however preteen general means persons between the ages of 10 and 12 (some times 9 year olds or 13 year olds are put into this grouping as well)
Perfectly normal.
no
Depends on car.
Yes, it is normal for a 5 year old to get erections during the day. It is even normal for baby boys and toddlers to get erections.