Revenge can be sweet and, um, apparently kind of itchy.
These guys let you purchase genital lice (crabs) for revenge purposes. Feeling guilty for considering clicking on the link...and buying some? Check out this excerpt from the site's page explaining its legality:
It’s no different than selling Sea Monkeys or an Ant Farm. It’s a small container with a small number of mostly un-hatched eggs inside, and really very few of them will hatch prior to arriving in your mail box. None of our crabs are sold directly from human feed chains, so there is no possibility of human DNA exchange even in the blood stream. They are all farm raised and fed animal product during cultivation. These do not constitute any bio-hazard!
There you go. Let me know how everything turns out.