An annoying problem that is faced by all young adult writers

So, I'm currently revising a book that's intended for an adult audience (but it could also be read by teens and children if they wanted to, because it's not like it's a porn book or anything). For most writers, that's what they'd call 'a book.' But when you're a writer of young adult novels, people assume that every book you work on or talk about is a y…