Welp, both of them manifested enough genre savviness and embarrassment to blunder directly into the trope. The fogged glasses was a pretty good save though, and both of them handled the aftermath like civilized people.
About them knocking… maybe, but knowing these two dorks they might've spontaneously combusted in embarrassment at the idea of talking to the other person in/from the bath.

Also when embarrassed, both of these two become airheaded meatheads. Can't expect them to think entirely straight.
I gotta love that for all that both are fighting oriented, they don't ever default to violence unless if they're having a fun spar or feel like they really need to. No embarrassment fueled slapstick/DV here.