She was in the garage, working on her new invention.
"I'm trying to create a mosquito that drinks your blood but doesn't cause a painful bump afterwards," she said, "My plan is to engineer this painfree mosquito so it's so much more fecund, long-lived and just plain efficient that it replaces the existing species of mosquito entirely."
"Oh, I can't see any way that could go wrong," I commented sarcastically.
She missed the sarcasm entirely. "Actually, I've already had a problem with it."
"Well, I managed to figure out a way to communicate with mosquitoes. It turns out they're really, really nice. I mean, they suck blood, cause bumps and sometimes maybe even carry disease, but they don't mean to cause any harm with it. They actually had no idea the bumps even happened - the mosquitoes have said thank you and left by then. The mosquito was horrified that it had caused anyone any harm."
"Well," I mused, "Is that moral, then?"