"You're just jealous of how good I smell today." Which can probably be attributed to the fact that the designated smoking areas are rather strictly enforced and he'd rather be out and about walking around the ship poking his nose around where he isn't wanted and investigating some of these paranormal oddities than spending the whole day sitting in the smoking area getting through a pack. And the fact that the ship has some nice soaps, of course.

"What 'we'? Wasn't I the last bloke you were ever going to work with?" And he fails to see how figuring out why they're here in the first place triumphs over a nice long hot shower.

"No guarantee you'd be able to toddle off this ship even if you do know why you're here, mate."