My cockatiel has a habit of pushing its body onto me on my back

[Sherkle]

Hello everyone, this is my first time posting here. I was wondering if anyone would know what is my cockatiel doing onto my neck. It seems like he (not sure) likes to push his head and body and preen afterwards. He also does not make any noise most of the time but maybe subtle chirps from time to time.

 

[wrench13]

Looks like mating behavior. He really likes you!