Here's one I photographed a year ago

He's gay

Might not be a live specimen

Oh good it’s not just me. I was worried I would have to bonk myself.

Anyways…bonk

I opened expecting something else, not going to lie. But it's a nice little bug.

As I said in another reply, two words... threadbare merkin.

I'm failing to see whatever it is you see, though I clicked through to the full size picture before looking at the thumbnail, so my view of the thumbnail was influenced by having seen the full size picture

A threadbare merkin

Increased surface area. Only male glowworms metamorphose into adult forms and they use their feathery antennae to track females down by their pheromones. Increased antenna surface area helps them pick up those pheromones.