I just found this - I don't visit this section often.
I don't think I really need to say anything - my handle & pic should cover it
- but I'll leave you with this....
Peri : "Doctor, why do you wear a stick of celery in your lapel?"
The Doctor : "Does it offend you?"
Peri : "No, just curious."
The Doctor : "Safety precaution. I'm allergic to certain gases in the praxis range of the spectrum."
Peri : "Well how does the celery help?"
The Doctor : "If the gas is present, the celery turns purple."
Peri : "And then what do you do?"
The Doctor : "I eat the celery. If nothing else I'm sure it's good for my teeth."