Can't remember where I saw it, but there's another variation of this P-Mate out there somewhere. It, more or less, resembles one of those medicine spoons. (Parents should be familiar with this spoon.)
Anyhow, it forms some kind of suction around the urethra to prevent any leaking. Of course, some labia spreading is involved to get that perfect fit...
Uhhh, I think I've gone into way too much detail!
