Whenever I see a stuck semen plug sticking out of one of my guyz butts, I spray the vent area with warm water from my spray bottle.
It loosens it, and usually comes out on it's own.
Thanks for the input everyone. The sperm plugs fell off this morning. I am relieved now. I panicked a little yesterday because when I tried to pull it a little, it looked like its internal organ was coming out together with it so I let it go.