Behavior…based on genetics or on the environment?
It’s amazing how itty-bitty bits of DNA do contribute to the strangest things: eye color, webbed toes, vestigial tails, and now…
Oh, I see, we’re not going with the Nancy-on-the-prowl theme. The garbage man is Dirk. He used to be Toni’s boyfriend and he beat up Brad, too (the appropriate responses here are “So?” and “YAY!”). There’s been a restraining order on him to stay away from Brad, which was a convenient way to write him out of the story.
(I had to look this up on Wikipedia — I wasn’t gawking at Luann with the morbid fascination of someone passing a train-wreck when he was in the script.)
So, now, we’re all caught up. And Nancy proves to be the most conniving and scheming practical character in the strip.
[Heh. She said “strip.”]
Oh, look! Even more Science!: