8 XXX : anal

Logically it makes no sense that I would do something so unsanitary as put my tongue in a beautiful woman's asshole but man it just really does it for me. Can't be rational 100% or the time.
Not the best quality but here is a video source. https://www.tube8.com/hardcore/remy-lacroix-goes-nice-anal/31288471/
What kind of oil are they normally using in these pronos?