This is the way I've always thought of it, also as a guy who's obsessed with ladies peeing...
I don't get any kicks out of peeing. I'm not an exhibitionist. But I could probably be talked into it if the right lady asked. At the same time, while I have no problem with consensual peeing from a lady, it adds a bit of spice if they're not 100% used to it - maybe they need a bit of persuasion too.
Seems like the perfect relationship: we'd both be trying to achieve the exact same effect from each other. Possibly at the same time! Also, it feels exploitative to receive but not to give.