For Valentine's Day, I give you parasitic Schistosoma mansoni worms, which mate for life. Much more monogamous than the humans they invade, the female Schitosoma mansoni actually resides within the male worm, in a groove on the side of his body.You may have seen this groove featured on MTV Cribs, which is a really stupid show on a really stupid network.The worms' love for one another is not all rainbows and unicorns, however. Their eggs actually cause disease in humans, most commonly schistosomiasis. Symptoms of the disease include fever, abdominal pain, diarrhea, and genital sores. It's easily treatable, but still really gross.Remember, the love you take is equal to the love you make.
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