does this dude have a secret piss fetish lmao
Maybe. On one hand, he didn't start screwing her right there, and that's clearly an invitation of sorts.
On the other hand, something might have awakened in him right then, but he implied that he didn't like that particular lady.
Now she probably has such a fetish and/or just exhibitionism related to it.
Maybe he's lucky, or unlucky (depending on how you view it), that it wasn't more than this.