The hilarious part is that young teens will find pretty much anything arousing anyway. When I was that age, one of the books in the Ender's Game series involved a weird scene where someone attempts to essentially seduce Ender. You can bet I re-read that scene a hundred times. Or a scene in a harry potter book where a couple young teens talk about making out.

If you want to prevent any "sexualization" content from reaching your young readers, you pretty much have to limit them to Go Dog Go.