'Gridanian Roots' acceptance text

EDIT: Disregard this; the joke went right over my head. I'll turn in my 'good catch' gold card immediately.

Original Post QFT:

When giving the introduction speech to 'Gridanian Roots,' the Rank 20 Botanist Quest, a text-box appears asking you to accept or deny the quest. It reads:

Join the Botanists' Guild?
Yes, I will answer the call of nature!
No, I must answer the call of nature.

Is the refusal supposed to read this way? Or, perhaps:

No, I musn't answer the call of nature.
Or, maybe:
No, I must answer the call of nature alone.

It seems very strange to me.

I think it's supposed to be a play on words.

As in, when you click in the affirmative, "Yes, I will answer the call of nature and expand my career as a botanist."

and when you select in the negative "I can't do your quest right now, because I need to use the restroom."

It's a bit esoteric... But that's what I think they were going for.

What Ferth said, I always thought it was a pun on using the bathroom , "the call of nature"

Ahh, that joke went right over my head. Damn, there goes my flawless good catch streak. /sulk