To be clear, occasionally it happens, you get a wild stream or else there are simply drips directly down from where the stream begins. On top of that it can splash out when impacting the toilet.
Obviously in the ideal world it never happens but when you’re half asleep or under the influence there can be piss not in the bowl. The former is why I tend to piss sitting down if I get up in the night, tbh.
I mean on top of that, I would imagine, like the vast majority of us, your boyfriend would notice and clean the floor when this happens. But cleaning a carpet isn’t really going to work out…