You're telling the joke wrong. You have to set up the question so if someone says "no", you can immediately say "wanna do X?". Like this:
1: If you went camping and woke up covered in jizz would you tell anyone?
2: No
1: Wanna go camping?
With your setup you'd have to say "wanna get tied to a stump?", which admittedly is pretty funny but only because of the anti-joke properties of it.
Also edit the title before I ban you for rule #1