Good question, i think all spiders also do this (tarantulas are not technically spiders themselves), but scorpions do it differently. Scorpions lay a small.... it looks like a mucus dildo, they call it a spermatophore.... on the ground and then guide the female over it during a sort of mating-dancing ritual.

Yeah I understand that a lot of people get the creeps with spiders. I remember a friend back in highschool telling me "it's the way they walk, it creeps me out"

But what's also true is that everyone ended up being curious about my tarantulas and would spend a few minutes checking them out, even if their first reaction to the concept of me having pet tarantulas was disgust or fear.

I wonder to what degree arachnophobia (even mild) is a product of society. This article is a good example, if even when someone is about to tell you something new and interesting about spiders they call them terrifying, of course most people will internalize this.