Agree... it's so early for this BS. Actually this is just a common trope that it's expected. 

I agree with your overall comment. Writers are producing fiction based on what they feel the readers want.

I think that is why I do comment from time to time. I would never want some of the very younger readers here ( I have seen many as young as 13 on up)  to think these are good sexual practices and this could lead to a healthy relationships.