Well, usually people who are dating do kiss each other, but not everybody who kisses each other is dating. Like...when two people think they like each other but aren't totally sure yet, or they just like kissing but don't want to be in a relationship because those get complicated and messy, or maybe they're drunk. Or their relationship is sort of like dating but not exactly technically that.

[He pauses to see if Demyx is following at all because he has a feeling that continuing with personal life examples will just confuse the issue further.]