When you cover your dick in butter and sprinkle salt on your nutsack. The lips around the member pushes all the butter up and in turn moisturises her lips.
Person 1: I gave her The Salty Chapstick last night.
Person 2: No way, did her tongue dig through your pubes to get to the salt?
-"I like flavor. Don't you like it when you kiss a girl and she' wearing cherry chapstick."
-"I don't like cherry."
-"Well then, don't you like it when she's wearing sex chapstick."
-"Yes. Yes I do."