Fleas and mosquitos are Satan's syringes and Vampire's vacuum to spread disease and other insidious parasites while causing as much pain itching and scars as possible.

One desperate family used themselves as bait to defeat fleas.
THey walked around with Vaseline on their exposed legs and feet until enough were stuck to be scraped off and thrown away.

Sometimes fleas will hide in the lining of clothing and attack en mass when you wear it. The only way to crush them is between your thumnails.