Hello mistfaer, first allow me to welcome you to CU, I hope you will enjoy you visits here
Mist sometimes when people ar fond of someone they express it with a kiss.
There are many type of kisses, for example there are kisses you give a brother and uncle, a father, a brother, a sister, a mom, an aunt... you know just a kiss on the cheek and a quick hug, sometimes even friends give each other hugs and a quick kiss.
There are also kisses that people give each other to show each other fondness and sometimes these can get out or hand. That is why it is not good for unmarried to be alone together, in places where things can happen.
I hope this helps you a little bit, you have given me an idea thought an maybe I should star looking for some Q&A that young people ask and post them here at CU