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Wee Stinker
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Count Dracula N?M?E?
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No best answer has yet been selected by davey b. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.svejk, it is certainly the case in the real world that blood-sucking ectoparasites utilise 2 types of chemical when biting, (i) anticoagulants to stop the blood clotting; and (ii) an "anaesthetic" to dull sensitivity at the site of the bite, so that the host does not scratch off the ectoparasite.
Here endeth the lesson!
Here endeth the lesson!