It's fortunate for them both that Bruce hadn't been the shirtless one. It's hard enough to get all of the pollen off of Tony's upper body without adding in Bruce's more extensive body hair as a pollen catcher. Offering to scrub Tony's back wasn't even some kind of come-on; he honestly needs the help.

For him the relaxation comes from the opportunity to finally decompress from the sensory overload of an alien city. He can stand under the hot water, scrub at Tony's back with his hands and blunt fingernails, and let the white noise of water bring him closer to sobriety and calm than he's been in hours.

"We need to work on getting all of humanity's eggs out of one basket. The universe is starting to come to us faster and faster, I think they need a good dose of homo sapiens in return."