I will be completely honest here, erotica. If u can’t find it on a book (neither can I) there are unlimited internet scenarios. Words can be far better than porn, and there are endless scenarios. Although personally I do this, porn is a choice there is little exploitation, those that do it choose it. For teens, under 18, it is extremely illegal and almost impossible to get on the internet, so unless your in the dark web that wouldn’t be a problem. I don’t like to judge, if they want that they want that. Still, erotica is much better. The pen is mightier than they sword, in this case, the porn.