What thrill does a guy get from a girl sitting on his lap?

Hey pplz, I'm a 14 year-old girl & almost all my friends are guys. I'm pretty close to all of them & most of them are pretty protective of me. I don't have a crush on any of them or anyone at this point so I can kinda do some things with them (not sex) and it won't seem as bad cuz everyone knows they r just friends to me. Ecspecially one, Dustin. We've been best friends & nearly inseperable for 3 years. When we are out @ recess he constantly pulls me down on him to sit on him or like in the bleachers he'll sit one under me and (this is gonna sound wrong, but its not rlly) he puts his body between my legs & his head on my stomach. He seems to crave attention from me. What is that?! It doesn't really bother me, I luv the compliments & attention myself, but I just wanna know. ***It's not sexual because if it was, I'd know it if he was, I'm not stupid.