Guys from Meatholes used to do it a lot (Tracy Gold, Taryn Thomas, Kat etc).
From still active sites, I only recall Facefucking/Ghetto Gaggers (allmost all scenes) and Woodman in his castings that spit on girls regulary (Eva Berger, Bambi Keutass, Nadia Bella...).
Katja Kassin, nobody...