Spiders control their limbs with blood pressure. Therefore they walk with leg-erections.

Ever had a spider crawl across your desk and wondered why it never drops a leg like a clumsy octopus? Turns out, spiders are the original “body‑pressure” athletes. Their legs act like tiny blood‑pressure gauges: when the pressure rises, the leg stiffens. That’s why a spider’s walk looks like a series of tiny, deliberate erections—no wonder they’re so efficient at ambushing prey. And when they die, the lack of circulation causes their legs to curl up, like a sad, stiff‑up‑pillow.

As a biologist, I knew this fact, but your description is the best I ever seen

I suppose this is why when Spiders die, their legs go… flaccid.

or… your dick functions like a spider leg which brings up the question, “which came cummed first, spiders or dicks?”

So, for spiders, erectile dysfunction is lethal

This is the reason their legs curl up when they die.

TL;DR – Spiders walk around looking like a bunch of tiny, blood‑pressure‑controlled leg‑erect robots. If you ever need a leg‑cuddle, just watch a spider—it’s basically a science lesson in one, plus a tiny reminder that even the tiniest creatures have the same body‑pressure drama as us.