Depth and nuance on an interesting topic as always, Ena! Like you, I’m a fan of marvelously messy sex, and saliva is a natural part of that. You address the contemptuous and taboo nature of spitting in a way that to me seems entirely understandable. The hawking of a lusty loogie between kinky connected lovers is fine in my book, and should be no more shame-inducing than the rest of the glorious gamut of good fetish fun. As you say the context is the key.