[ Oh, he didn't even think about booby traps in the place... he can probably take her word for it. A booby-trapped couch is far fetched even for a guy like him, after all.

Though on thinking about it, it actually sounds pretty great. Someone could hide a lot of emergency defenses in one of these things. Usopp rummages around in his handy-dandy purse for a spare bandana to toss down before he sits. He could only wipe his boots so much and all and it's not like it's made of gold and silk, and she did invite him apparently knowing the kind of guy he is already, but he's been messing around outside all day, too. It only seems fair to try not to dirty up someone else's furniture.

You mess up your own house and you just have to fix it up since it's your responsibility in the first place. You mess up somebody else's and you usually get chased off. Then maybe called back later to fix it up. Or they'll clean up after you and you'll feel really guilty and they'll sort of watch you like a hawk when you're near their fragile treasures or blank walls for the foreseeable future. People are so mistrusting anymore. ]

If you ever want it to be, you should let me know. I bet I could make this thing really great to have in an emergency!

[ If by 'great,' he means 'steampunked out and liable to backfire.'

... which he generally does. ]