Thanks for all your answers
the pictures I use are from paid / premium porn sites and I use them to illustrate my categories but this is not illegal as I advertise their website using public pictures (screenshots from the main pages or banners that I crop)
The thing is I do not want to do a porn list promoting only premium sites, I wanted to show both free and premium sites as I understand not everyone can afford or is willing to pay for porn. Should I just display sites that have the "DMCA remove button" in their footer?
This way they will contact them first so they remove the illegal content.
I checked some of the free sites I promote and they have it, not the case of the hentai site above. Also by writing that I do not own these sites and am not responsible for these, is it legally ok ? Sorry for my poor English, being French and receiving these legal notices in Enligh is a challenge lol