Scans_Daily

It makes sense when you consider Luke's istory. He's the hick moisture farmer from Tattooine. All he's ever had to look at desert, sand and more desert, with an option of rocks if he's lucky.

Once he was on a world with water in abundance I can imagine him being obsessed with water as a feature of the natural enviroment, seas and rivers, oceans and waterfalls, and to Luke learning to swim (because you might need to KNOW how to swim) would seem like the coolest thing EVER.