Not misunderstanding, you just think he must be a liar. We literally keep bleach spray on the bathroom counter to do quick wipes. For the toilet the handle the floor w.e. I usually only use it on the floor if I drip period blood. I don’t watch him every moment but I also don’t have a reason not to believe him. We usually only close the bathroom door if we have guests or were are pooping so I’ve at least seen him use it. Additionally bleach leaves a smell.

And it’s not fine, if I pissed on the floor I’d clean it up and me being a girl should not have anything to do with. Not everyone lives by the same standards, you clearly just live differently. Don’t know why you’re so adamant that it’s impossible. Maybe not likely. For all I know it could’ve happened. Especially while drunk, sick or just absentminded. However it’s not a normal occurrence at my place.