They need space.
Knock-Knock Jokes
Astronuts!
Astronaut: Feels pretty good to be 33 million miles away from Dave Matthews Band
Houston, I have a problem."
Irrelephant.
I SEE IT!** ooooohh **I NEED IT!**(https://www.youtube.com/watch v=Ps0MfBG5-Uo#t=1m24s)
Student : By Staying at home. :p
A fresh air freak.
You'll never have to worry about being in a long-term relationship.