- What should you do if your girlfriend starts smoking?
- Slow down and use a lubricant... yeah, but not an oil based one - she may catch fire...
Some more this style jokes:
- He found a better job, got a new gf. All because he stopped smoking.
- I need to start smoking, so then I can quit and all sorta good shit will happen to me...
- So... how long have you stopped smoking for?
- Let me see... about 1 hour 30 min...