Of course they get crushes. Here's the thing - my 17 year old daughter is sexually harassed literally every day by a 17 year old boy and member be of our ward. He hugs her every time he sees her, he talks about porn in a joking way, and he all around is a creep for her. The other adults in the ward adore this guy because he puts on a good show of righteousness but my daughter hates him.
I guarantee his happens in virtually every ward in the church. I've personally heard a Deacon say "I want to f### her brains out" while sitting on a temple bench waiting for his turn in the font while observing an girl being baptized.
"This happens everywhere" is not a good way to make policy. 16 year old boys are not emotionally mature enough to be spiritually intimate with girls. My daughter would have no recourse but to let herself be baptized by his creep. And yes it probably happens all the time with adults but it doesn't make it right.