There’s a few spiders that do this (I know some orb-weavers do) and IIRC scientists don’t know for sure why, though it’s been hypothesized that it could be either to confuse potential predators or to make themselves and their webs obvious to larger animals.
Some orb weavers like Argiopes even make a thick zigzag construction in their web called a stabilimentum that we don’t really understand the function of, but one theory is to make the web more visually obvious so larger animals don’t accidentally barrel into them.
Spiders are neat.
Love their Trippel though
Im sure some people are attention seeking to some degree but most people i know who go on neighborhood runs are just out doing their own thing and if anything are overly self conscious about showing off their bodies. I overheat incredibly quickly when I go for runs, and I frequently have to peel off my top layer and I’m still soaked. I can’t imagine I’m the only one. And I absolutely hate having any attention drawn to myself. Judgment from other people when I’m just out trying to get in a nice run outdoors sucks.