About the only thing I remember ever turning down was a request to role play as Grandpa. Mainly cause I didn't think I could do it in a sexy way.

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Put me on wheels and I'll turn tricks.

Clever? Nah, I ran out of that years ago. But if you find this, let me know, k?
"The road goes ever on..." ~ Tolkien

In memory of my friend skip...
Go then, there are other worlds than these