Try to imagine being a moth, just hatching from your cocoon. I’ll give you a minute… Crawling out of the silk. Dragging your wet body up a tiny grass stem. Are you there? Okay, you are a male. You don’t know anything, and you can’t think anything, although those two conditions are not causal. I mean, it’s not because you are male that you are mindless. A female would be in the same condition, intellect-wise. Whatever. You’re a male moth, but, having no mind, you don’t know what it means to be a male. You don’t even know you’re a male, but I’m telling you. Imagine it. Male moth.
One thing you can do is detect signals from your environment, both internal and external. From the outside you pick up a scent with your antennae, a little buzz, or a tiny shiver of “yes.” You try to flap your wings because you can’t imagine doing anything else, but they don’t work. They’re still wet, hanging off your back. So…
A half hour passes, during which you don’t do anything except crawl a few inches higher on the dead grass stem that you touched with your little tarsi, your toes, and try to move those limp rags—the only parts of you that seem important, besides your antennae, which still buzz a little.
It is dark, which you recognize as different from light. But it doesn’t mean anything. It’s just dark.
After a time, your wings dry and you are able to fly. You don’t know why, because your brain has no logical functions. But what else is there to do? It’s pretty different from the limitations of the caterpillar. But you have forgotten that.
As you fly aimlessly about, you once again notice the little “yes” signal from your antennae, so you begin to fly a zigzag pattern upwind. Why upwind? Because that is where the signal seems to increase, and you are driven to increase this little “yes” feeling. It’s good.
But what is this mysterious scent that draws you inexorably forward into the night? You don’t know, because you are ignorant of everything but sensations and compulsions. But you keep at it, back and forth, always upwind, as long as the signal increases.
And then the scent disappears. Damn. You had only one thing in the world that motivated you, and it vanished like a change in the wind. You would think, “Stupid world!” if you could think. But you can’t.
Of course, it was a change in the wind. So you’re left mindlessly—I mean, seriously mindlessly—flying around with no destination in mind, because you have no mind. I can’t stress strongly enough how dumb you are. Just pathetically moronic, with no explanation except that with a brain that small, how smart could you possibly be? It’s not an insult, it’s just a fact. Even if you tried to think a thought, you’d fail. You have nothing.
But wait! There’s that luscious signal again, on the breeze. You resume your mindless quest to find enhancement of that happy message. You have no memory of having forgotten it. You just go for it. And it gets better.
Finally, when the signal is so strong that it threatens to explode your tiny brain, you bash clumsily into—another moth! “OMG!” you would think, if you could think, “I’m not the only creature in existence?” No, dummy, there’s another, just like you, with similar wings but, oh, my goodness, she’s not exactly like you! And this scent signal has you turned on like a freaking mercury vapor arc lamp, and she seems completely receptive to your sudden desire to… Wha–?
Well, here’s an interesting little factoid. Insect genitalia are pretty different from ours. In fact, ours are sad little features that I might characterize as a post and a post hole. But with moths, the male parts have claspers (what if she tries to fly away?), prongs, brushes, hooks and barbs—a whole assembly of details that makes sure that this female has the right species fit. For her part, the vaginal canal has expanded balloons and spines and long twisted loops—a whole assembly of details that makes sure that this male has the right fit. It’s a lock and key arrangement. It’s how they avoid hybridizing, and how we identify most similar-looking moth species.
Okay? So by now, you’ve made your entrance and you have to work it around corners and hoops and into crannies, and when it all feels just right, you start to work up a reproductive package. This involves pushing a long, clumsy spermatophore through your own convoluted system into her complex bursa copulatrix This is not easy.
Several hours later…
When the sun comes up, you are a mess. The signal is gone, she is gone, and you’ve got the sun blazing down on your face like a blowtorch. Then an enormous sparrow roars into the scene and grabs you in its beak and holds your wings down with its talons to rip them off, and mashes your tiny body a few times, and your last sensation is the dark throat and crop of this destroyer as you blink out. If you could think, which you can’t, you would think, “Ha ha! You ignorant, blundering predator! You’re too late! I already did it!” Life is good.