I have come really late to this thread because I've been avoiding it, but I have been thinking about the original question.
When I was a child I always looked way older than I actually was. I was as tall as my teacher in the first grade (she was a really short woman, but still, she was an adult). And I've always been well-endowed. My mom said I was "born with a bustline". I was also a pretty intelligent kid, as far as books and vocabulary go, so I probably didn't talk like a kid.
It was very common for men to pay attention to me that, as a child, I was not ready to handle. I do want to be clear about something, though. Aside from one very brief incident with a guy who was later convicted of molesting his girlfriend's kids, I wasn't abused. But I was uncomfortable, embarrassed, and scared. Often.
You know how a man looks at a woman he's interested in, or winks, or tries to start a conversation with her? That sort of intense, mildly sexual interest? Stuff that would be totally innocent and normal and welcome if both of you were adults? Well, if you're on the receiving end of that as a kid, it's uncomfortable and scary.
I'm not saying that they guys who made me uncomfortable were bad guys. The vast majority of them had no idea how old I was and probably would have been horrified. But I am saying that kids can instinctually realize that some interactions are uncomfortable...that there's something wrong with them. Even going to the mall, when I was a kid, was an exercise in embarrassment and discomfort. It was made worse by the fact that guys my own age didn't like me at all.
Talking about it with my husband, much later, I realized that all the attention that I'd received that made me so embarrassed, uncomfortable and scared, would have been considered perfectly normal by an adult woman. The fact that I'd tried not to think about it for so many years, and had built up such a wall around it with big flashing signs saying "Scary! Stay away! Something wrong here!" in my mind...when I finally realized what had been going on, it was such a relief...finally, it wasn't something I'd done wrong or something that was wrong with me...it was just a misunderstanding (usually). Of course, I still have issues about it...but at least I know what I have issues about.