How to french kiss

Moisten your lips. Dry lips do not move well together. Just a light brush of your tongue over your lips will be sufficient to moisten them. In general, use lip balm regularly- you never know when someone will go in for the smooch.
Angle your head. If your mouths meet dead-on, your noses will get in the way, and you will not be able to kiss deeply or smoothly. To avoid this, tilt your head slightly to one side. Make sure you do not both tilt your heads to the same side.
Close your eyes. As you approach for the kiss, look into your partner's eyes, but, once you are close to theirs, close your eyes. It can be a bit of a turnoff to be kissing and going cross-eyed. However, you don't need to always close your eyes; some people enjoy keeping their eyes open and seeing their partner when kissing.
Start with a gentle and soft closed-mouth kiss. The French kiss is an open-mouth kiss, but do not lunge in with your lips agape like you're going to eat them; instead, open your lips very slowly. If you were learning to speak French, you would probably start with the basics, vocabulary and grammar, before trying to write poetry. Well, the French kiss is like the poetry of kissing, and before you can be good at it, you have to master the closed-mouth kiss. Even after you have added French kissing to your romantic repertoire, it is usually better to start a kiss with closed lips.
Go Dutch on the decision to French. Kissing should be a shared decision. You need to have permission to French kiss someone, but when your lips are locked with theirs you may not want to stop and ask, "Hey, this is great, but can I put my tongue in your mouth?". Open your lips slowly and just a little during the kiss so that one of your lips is sandwiched between theirs and one of theirs is between yours. As you are locking and re-locking lips, brush your tongue against your partner's lips ever so slightly. This should make it clear that you want to French kiss. If your partner's tongue does not respond in like fashion or if they pull away, you will have to save the French kiss for another time when you are both ready.
Explore with your tongue. If you and your partner seem to be enjoying the open-mouth kiss, slowly try to open your mouth a little bit more and gently push your tongue a little farther into their mouth. The tongue is very sensitive, and the mere act of touching your partner's tongue with your own will be very pleasant and stimulating for each of you. Do not stick your tongue too far into the mouth, as this can be a big turn-off. Instead, just gently and playfully touch tongues. As a guy, when you are starting to French kiss, touch your tongue to hers very lightly. If she wants more, she will come and get it.
Go slow. Passionate kisses are good sometimes, but to really enjoy a French kiss, you must take it slow. Do not hurry and instead, take time to explore each other's mouths.
Breathe. If you’re kissing for an extended period, it’s easy to forget to breathe. Believe it or not, gasping and turning blue is not romantic. Take small breaths through your nose as you kiss. You do not forget how to breathe! As you and your partner grow comfortable with the kiss, you can try breathing through your mouth a little: sharing breaths as well can be romantic (but not everybody likes it).
Mix it up. Kisses are like snowflakes: no two are exactly the same. Once you finally feel comfortable French kissing someone, it is tempting to try to do the same thing every time. Add variety.