1) It has to do with Puck holding hands. I think it was really personal to him and that's what he loved about relationships(?) I remember he liked holding Rachel(Mercedes?) Becuase she's the one to initiate holding hands and makes her needs known. I remember it does end with Puck getting with Kurt.
2) It was about how it was always Puck&kurt and that no one could split them apart when they were children. They were then joined by Santana&brittany. Puck and Kurt got into a fight and stopped talking once Puck found out Kurt knew about Quinn being pregnant and didn't tell him. It end with Puck purposing to Kurt after Graduation(Santana had to bully him into it cuz he was chickening out)
That's it! Help is appreciated