My ex solved this by tattooing the area he'd inject. Well, not solved, it's never solved. Just found a way to cope, like it seems you have as well. I think some people really hate hurting themselves. Needle pain is such a specific pain, because it's piercing. I am wondering if a simple addition could assist people as they need to self-administer medications. Something as simple as a translucent colored tip. I am not sure, it'd probably would not only fudge with the mechanics, but also add too much waste/cost. It's just that you are not alone in this. Plenty of people need to inject themselves regularly, and there's probably some simple solution that could assist in making these medical devices just as functional while being a little less intimidating in form.
Mind you, I know they're not toys.
Those are quite cute! I was thinking about a silicone veil that pushes back against the skin but veils the needle. It seems like a considerable amount of waste though.