Grass is greener on the other side

I think i saw a connection to what erica said in class earlier this week and another event in the text we read over the weekend. Erica pointed out the scene with the 2 men who received things from Quentin but immediately tried to trade each other what they got from him. Erica said that this scene revealed the idea that people are not satisfied with what they have (the grass is always greener on the other side). I thought this idea was brought up once again with the 3 boys standing on the bridge talking about the reward for catching the trout-- a 25 dollar fishing pole. They spoke about how they would try to trade the fishing pole for other things. I feel that Quentin constantly thinks about what his life could be if Caddy was not promiscuous or had a real mother, etc. That is why in Quentin's section we hear more people bickering about what they do not have and what they want.