ID:182673
 
http://en.wikipedia.org/wiki/Erector_pili_muscle

So I guess people aren't suppose to be able to control goosebumps. I can voluntarily give myself goosebumps. I can make myself get a tingle in the base of my spine on my neck and I can get goosebumps whenever I want.

Do I win a special person prize?

~Kujila
I can imagine myself chewing on a brick and it gives me goosebumps. However, I don't think psychological control counts.
In response to Foomer (#1)
Foomer wrote:
I can imagine myself chewing on a brick and it gives me goosebumps.

"Go chew a brick" is one of my mother's stock expressions.

Lummox JR
I can somewhat do it voluntarily but not perfectly, sometimes when I try it I'll get stuck halfway between getting the chills and not getting them and I get kind of uneasy after that because my body wants that last little shiver (and goosebumps) from it to happen but it won't.
In response to Nadrew (#4)
Meh, same here, that's pretty annoying when it happens, I keep trying until I get it. Seems to be easier to do when it's colder, or you've got your shirt off or something, which makes sense, I suppose.
In response to Nadrew (#4)
I can think of the theme from the first movement of Dvoř├ík's Symphony No. 9 and it gives me goosebumps. So, like Foomer's brick, it's semi-voluntary.