Is learning about kissing before marriage through text-only haraam?

Recently I have been curious about knowing how do people kiss. I have read it on a website that it's okay to learn through websites but not through pictures and videos only when you are about to marry. So I want to know if it is okay to learn through websites through reading. Although I'm in my 20's but not about to marry in the near future. I'm just curious to know how kissing is done. I would like to know if it is halal or haram? If it is haram is there a halal way of learning *"how to kiss"* ? if yes what is it? If there is no way then when, from whom and how do you need to learn about kissing?