I've not had experience with a Tgirl, so far as tinkling goes, but I have had my genetic girlpussy peed on by both another girl and the guy I am intimate with. He directs his stream onto my clitty and WOW! We do this in the shower, at poolside, or by the lake, BTW.
If things progress to sexual activity with the Asian ladyboy (castrated, with a really small thingie) I've recently met I might suggest "She" do that to me too. Since it's doubtful that her itty bitty penis will get hard enough to penetrate me we will have to explore other fun, right?
As for peeing in my mouth...FORGET IT!
