A close friend of mine assumed that just because I'm a SiStar, I was a turtle too. So he asked the question followed by a borderline suggestive riddle that I answered correctly. His reply was: You need to be a Turtle.

The Riddle was:

I’m long when I’m young,
I shrink when I’m old.
I start stiff,
But I’m useless when cold.
You grip me tight and move me fast,
And when I spit, I don’t always last.

What am I?