Invisible

It’s been a few years since the invisible man married the invisible woman.
Their kids are nothing to look at.
What's invisible and smells like worms?
Bird farts.
How many Conservative economists does it take to change a light bulb?

None. The invisible hand does it.
Q: Patient: Doctor, sometimes I feel like I'm invisible.
A: Doctor: Who said that?
What is invisible and smells like carrots?
A Rabbit's flatulence.
Do you know where in a hospital the invisible man can't hide?
The ICU.
"Doctor, there's a patient on line 1 that says he's invisible."
"Well, tell him I can't see him right now."
"Doctor, there's a patient on line 1 that says he's invisible."
"Tell him I can't see him right now."
I’m invisible. [Really?] Can you see me? [Yes]. How about tomorrow night?