The same way and first time I kissed my ex gf, at age 28 you see sparks fly. Kissing all comes natural when you start dating so I wouldn't worry about it .
Your first 'real kiss' is very special and because you are nervous and excited at the same time it can be a bit tentative. Your lips are full of sensitive nerve endings and it can be quite a shocking experience especially if you have a strong attraction to a boy.
I remember my first kiss - a long time ago, and I can still recall it. I laid in bed that night and couldn't believe it! So I hope you have the same lovely experience and enjoy it.