Jason will sometimes randomly run up and hug Pythagoras. These hugs usually involve him lifting Pythagoras off his feet rather enthusiastically.
20 Fluffy Jagoras headcanons by Emerald Has Been Cumberbatched
He'd never had anything like this happen to him before in his life. Jason was very affectionate, Pythagoras had learned. Ever since they'd gotten together, he'd been given kisses, smiles, cuddles and words poets couldn't write better. And the hugs. Oh, sweet Poseidon, the hugs. Jason loved giving hugs. At the start of their relationship, Jason had simply put his arms around him and held tightly for several minutes. Not anymore. Oh, no. Now Jason had a new favourite activity to do with him.
It would start with the thumping of feet which belonged to Jason. The next thing Pythagoras knew, he was being crashed into and held by a soft-hearted hunk who seemed to think that his mission in life was to show his lover affection every time he saw him. Not that Pythagoras was complaining.
Then Jason would straighten up and suddenly the mathematician's feet weren't on the ground anymore and he had a view of Jason's curly, dark hair.
He loved Jason's hugs. They made him feel safe, secure and cared for. He also knew that Jason liked it when Pythagoras stroked his hair, as Jason buried his face in the soft blue of Pythagoras's tunic. Jason could probably do this all day. He would if it wasn't for the fact they were subject to 'aww's from Medusa or Korinna and 'oh, for the love of the gods' from Hercules.
They weren't for anything special, Pythagoras had thought. He'd told Jason that and the man stared as if he couldn't believe what had just been said. "Of course they're for something special. Well, someone."
Pythagoras hadn't understood what he meant until Jason cupped his face with his hands and smiled, looking deep into his eyes.