My toilet isn't even a foot from the shower. If I have the need to go, I go while the water is getting to the right temperature.
I agree with RD's original post on this one..... and for the fact I don't think I'd enjoy pee running down my leg.
And for those of us who think pee'ing in the shower is gross. I overhead a group of "ladies" talking about how they have POOPED in the shower and "squished" it down the drain. WOW.