Because when you're stranded on a giant frozen rock with constant snowstorms and giant snow yeti monsters (I forget what they're called), the first thing you think about is paying an old man for sex.
Trust me... he also plays bagpipes... and I mean a lot... It's annoying working on the set sometimes and all of a sudden you just hear him starting to play lol I mean, it's fine when he is doing good... but when he misses just one note... on bagpipes... it's pretty hard to recover and get back into it. Plus... hearing it all day is annoying... after a while. I'm just waiting for the day I walk past and he waves a hand and says: 'bagpipes will be fine.' and then I suddenly start believing that. (Also, yes... I know what you're all thinking. 'What is this guy talking about?', 'how could he know this?' etc,etc... Or you could just be thinking about lemmings and cliffs. I dunno. :D)