I was weeding my butterfly garden, and, boom, out of nowhere a wasp stung me through my glove! The good news is I think my immunity to the suckers is building b/c my reaction is minimal-just some swelling and throbbing. I know some people whose whole arm would swell. I love butterfly gardening, but the same plants that attract butterflies attract every stinging insect on this planet. And since you're supposed to protect the caterpillars, pesticides are out of the question. Wasp and yellow jackets love to eat my baby caterpillars too. Darn you wasps and yellow jackets!