I think he revealed his true reason to be on the show when he said on You're Fired that he thought the Paris task was a treat. Quite a revealing comment, I thought.

Hmm... I wonder if he had no real desire to be Sugar's partner. He didn't show much desire this week!

surprised he did not use the opportunity to pop the question to his girlfiend (did he mention he had a girlfriend Duh only once of 50 times)