I had my first proper snog in a disco when I was 13/14. I was in a group of boys and girls from school and one the girls suddenly sat on my lap and asked for a kiss. I'd heard about people using tongues when they kissed, so I decided to use mine to show how grown up I was.
She was a bit startled when I first started probing away, like a kid trying to remove the marshmallow from inside a walnut whip, but her curiosity made her continue.
I then saw her talking to her mate, who looked wide-eyed in response. Curiosity got the better of her mate and she came over for a snog, too, followed by another girl.
I went home feeling like Don Juan, but they probably went home thinking WTF was that?