Erwin lets Levi swat his hand away to attack his buttons. He holds still and lets Levi do his thing, knowing that it's faster to let someone with two hands do the job but still internally wriggling with shame that he can't do it himself anymore. This is something he'll be practicing once they're settled in somewhere, until he can do it himself.

Although when Levi reaches up to adjust his collar, Erwin's remaining arm twitches, like he really does want to turn this into an embrace. He ignores it, and nods when Levi steps back.

"Thank you." He's not going to ask Levi to help him with the brightly-coloured shorts. He can handle that himself, thank you very much, and will wait until Levi is using the pump to clean his legs.

"We should walk back towards the hole in the wall. This area doesn't seem to have anything permanent." He looks back at the water, his brows drawing down in thought. "Although I wouldn't mind being able to see that every day."