I wouldn't even really call this recursion. This is closer to a wrapper around the enjoy function to set variables so that "enjoy" doesn't throw an error.

Depends on your optimization level.

Oh. Now I get it. Thanks.

Yes.

Structure and Interpretation of Computer Programs makes a distinction between recursive procedures and recursive process. A recursive procedure calls itself, but the compiler or runtime could potentially process it in an iterative way. The stack won't blow up. A recursive process, however, will always blow up the stack if left unchecked.