[Apocryphon]

I would not characterize it as phobia, so much as I find them disgusting for some reason, dirty and unclean.

[elevaet]

It's just your conditioning. If you look at it from another angle you can see that they are actually harmless and clean. And even playful amd cute if you goof around with them a bit.

[Apocryphon]

Maybe it's about being grossed out by cobwebs.

[zabzonk]

which jumping spiders don't do