I like reading text erotica because you can do it on your phone, out in public, and unless someone is nearby and looking directly on your screen, it doesn't set off any alarms with people. You can't do the same with pictures and videos.Erotic pictures were great back when Tumblr was around. I have not found anything that is really worth regularly visiting since.
When I was young, I liked to read sex manuals, medical books and sex research (The Hite Report, The Joy of Sex, The Naked Ape, Our Bodies Ourselves, Masters & Johnson, to name a few)In some ways, I've come full circle. I haven't looked at porn sites since I found Zity a month ago!
The mind is such a powerful thing that when a story is well-written images that it conjures up are far more lucid than any photos and certainly more so than videos. In the case of the latter, there is too often a smutty element that makes them less than appealing.