I don't find spitting sexy. I also hate it when men spit on my vagina, their fingers, their cock or my nipples for lubrication. It feels so cold and impersonal. I'll always had the lube.
I remember one man asking me to spit on his cock, I was really confused because my adverts are all very GFE vanilla, do not hint at any sort of PSE which is what I consider spitting to be. I'd also clarified with him in my screening that I was offering a gentle service, not wall-to-wall or PSE.
Turns out after he liked the lubrication, so I got my trusty lube out. Much better than saliva.