What happened to genres?

There was a time when I could count on genres to mean something. What happened to that? It used to be I could be I could pick up a YA book and find little to no obscenities and definitely no sex. Plenty of emotion but sex, if it happened at all, happened behind closed doors.

Today, not so much. It seems like language and sex are no longer avoided and this makes me sad. I’ve always felt comforted knowing that if I wanted a tamer book, I could just pick up some YA and be a happy  reader. If I wanted something more adult, I knew where to go for that.

What happened to the separation? What happened to knowing that hey, the book might be about a kid, but it’s not YA so it’s geared for adults?

Or maybe it’s just me. Maybe I’m having a hard time with the whole concept of changing times.