If you want to try flavored syrups, (yes i'm being practical, but seriously here, no noe likes to deal with the blahs) get a flavored gel (sugar free - try the wet brand or something like it) made expressly for oral sex instead of chocolate syrup or honey, the sugars in them (hershey's or something) can make even a non yeast infection prone woman get the yeasties bad!
Also teasing the area (lips, clit, etc) it a very good precursor to any further stimulation.
Oh and what hotsafrick said about not stopping, very important.