text: The reason of Luke going on trips across the oceans because he likes it and he was born to do it. Also his freind asked Luke to come with him to keep him company during the trips. Luke was waiting for some thing to drastically change his life and he to his wish off the drastic change. Luke would stop going with don if Luke didn't like the motion sickness,or because there where a lot of storms,or he didn't like tending the cows during the long and tiring journey. If the possibility was that Luke didn't like the sea his freind would be like are you ok and or something like that.