Ever since I was little, whenever someone would say a word and use a hard S, I would get a tingly feeling in my head. It sounds really weird, but it's true. I liked the feeling, too. The hard S--for example, on the kids' show Hey Arnold, Helga's sister Olga always spoke with in a really girly voice, with hard S's.
Has anyone else experienced this?
Has anyone else experienced this?

I think I know exactly what you're talking about. There is a Facebook group forming (and an upcoming website) called Autonomous Sensory Meridian Response Group.
Check it out and see if you gots what we gots! :)