Jordan never really took things higher than the YA level of appropriateness (though it could be argued the damane parts in The Great Hunt were heavily into BDSM), but he wrote about drinking and some allusions to sex here and there (Rand and Aviendha having their little getaway in Seanchan was probably the closest it came to a real sex scene). I would be interested to see the last books broken down by author (what RJ had already written, what BS added) and see if he did write about it in those books.