"What if something happened?"

Like, what? Ninjas? Soap in her eyes? I mean, if she slipped and fell, he would hear her, right?

I mean, he told her he didn't have an issue with her having her period, AND he pointed out he was tired and buzzed, and just wanted to lay there. the bloody water part was like, the last, least item.

GF just wanted to be pissy about something. I mean, you're allowed to not want to share a shower without being some kind of regressive male beast.

Also, based on the number of times Reddit has post about women having an unexpected "gusher" and octaclots, that whole "4 seconds, no issue" seems contrary to what you actually experience.