it's kinda nice. it's feels warm and like you have your lips on another's lips but like kinda a soft, tender sensation. it's also feels pretty good when it's really intimate, since you can feel the persons warmth and your heart is racing since it's a mutual moment of affection with the person you love. you also want more, and feel like you kinda can't get enough. i remember me and my last gf kissed almost 4 times after saying goodnight since we didn't want to go to sleep without another.
in summary, it's a tender sorta feeling on your lips that feels nice and the intimacy associated with it is kind of addicting.