1. Embrace the moment and 2. take it slow. You really, really should be wanting to kiss the person, and when you approach those lovely lips, do it slowly - there is zero hurry, this is your moment. The person will then most likely wait for your approach and you can decide how long this lovely moment will take.
3. Choose a part of the lips to kiss. It can be the corner of the mouth, just the upper part of the lower lip, the Cupid's bow.
4. Choose which parts of your own lips you want to come forward first. Also: combine the movements of your lips with the movements of your head.
5. Apply different pressures of the lip.
6. Let go of the kiss, and then kiss again. And again. The key here are the intervals.
7. At some point, smile while kissing.
8. With the tip of your tongue, you can softly part the person's lips.
9. Hand placement.
10. Temperature is fairly important. If you have cold lips or tongues for some reason, kiss right after having a hot cup of tea!
11. Add the tip of your nose. To be stroken lovingly.
12. Of course you can "kiss the alphabet" (literally shaping the letters of any alphabet to touch different parts of the mouth and tongue - BUT, the idea is not to stick to the letters in order, just to have a starting point; you shall get lost in the moment and forget about the letter almost right away). Better put: you always kiss half the letter of the alphabet. Most important: communicate. You "listen" with your tongue to the other person's tongue, and you "guide". Also delightful: ask the person to press the tongue against yours.
13. Make it fun, it doesn't have to be dead serious - but tell in advance before trying more unusual takes.
Comments from readers:
"I am surprised how much you emphasise the liking of the person. I don't recognise this at all."
Thank you for the input – not commenting on persons, just the kiss itself.