The Perfect Fly

[Mayfly]

For the sake of discussion, let's say that a 'perfect fly' existed. Further, by 'perfect' I mean just that. As long as you were fishing for trout it didn't matter what the water conditions were, it didn't matter what was hatching or the time of the season. As long as you presented this fly so that it could be seen by the trout, the trout would take it. Also, you can get as many of these flies for your own use as you want so you will never run out.

Now the question: How often or when (A - H) would you use this 'perfect fly' and for how long (I - L)?

A) Each fishing day.
B) Once a trip if a trip was more than 1 day.
C) Every so often.
D) Once a season.
E) On new water only.
F) Only if I was alone.
G) Only if I was with other fishers.
H) Never.

I) For a few trout.
J) Till I caught a BIG trout.
K) For a short time.
L) Until I got bored or tired.

Allan