1. The sperm that has not fully come out of your penis and when you go to pee you see some sperm come out with your pee that has stuck inside the shaft of your cock.
2. Cum stuck in shaft of your dick that become visible when peeing.
3. Jizz and pee mixed when you piss because it was stuck in your shaft.
GUY: "God damnit dude I almost couldn't even pee because I had stickcum in my cock!"
FRIEND OF GUY: "Should of pissed right after you hooked up with that chick then."
To make your own stickette: Take a piece of wood, like a small sprig off a tree, paint a face with eyelashes and possibly hair, skirt is an option as well.