If your girlfriend wants to kiss and its your first time how would you kiss or how to kiss?

Well, it depends on how he asks if he's like "oh gimme a kiss", then it's probably a casual request so you should just give him a peck on the lips. If he is being serious or romantic then flash him a smile, cup your hand around his neck and pull him in slowly. Eye contact is everything. To make your kiss extra sensuous, pause just before your lips touch. Then kiss away. Make sure to close your eyes! There is nothing worse than the feeling of the other person looking at you when you guys kiss. There's no set way on making out. Just go with the flow. But don't use too much tongue. You are not a puppy dog! :)