Parasites similar to mites that dwell on the head. Or inside...for they have the ability to travel to the brain and subtly take over a human's consciousness.
A spieve is the chocolate chip shaped piece of fecal matter created by shoving an un circumcised penis in a dirty anus(see Capt. Paul Watson from Whale Wars).
When you roll the foreskin back the spieve will appear and at this point you will be able to harvest it and put in your favorite candy dish.
The dad Billy bob from the show 18 and counting has a bowl of spieves at his bedside after he rams his ugly babyin the dumper.
Hey, sweetie! I'm so glad we've been married all these years, but I just won 100 million in the lottery and realize that I'm NOT so glad we've been married all these years! Here's your half, and I'm outta here, Bitch! I'm Splieaveing your ass!