Being sat on

Once i lay down on bench in the school yard At the break and some girls from my class comes and told me that they want to sit , but I was so comfortable So I didn't want to get up so one of them just sit on my chest and say it's ok it's it's better it's more soft and comfy and she smiled to me , and i say it's ok i dont care now we Both of us comfortable, and the other girl say ok if you dont care.... and she sit down on my stomach to, they both sit on me and talk with the other girls was there , one of them want sit to but the break it's over and we all get's up and go back to the class.

I quite liked it , and I still love these things happen to me .
It happened to any of you ?
It is normal ?