The slow decline of FFXIV, a summary.

[NaoSen]

FF14 has the best ERP scene

Maybe most easily accessible is a better way to put it both by volume thanks to amount of degenerates and by animations and such to carry them in the act itself thanks to mods (If SE truly cared about mods they'd be gone by now).
One could argue that WOW potentially has a better one since graphically it cannot carry you so the writing quality would need to be higher, I've read RP profiles there and its some deep stuff.