Ah yes, I cooked up this Gem while waiting for people in front of me to use the NMR. We were all sitting in the NMR room telling each other crappy jokes (actually it was just me telling them) when this popped into my head.
Helium, Oxygen, and Carbon walk into a bar. After a few drinks they start talking about their sex lives. Helium states proudly that he is happy being alone and has never found anyone he'd like to "bond" with. Oxygen pipes in and says that he's been with his significant other forever now, and he's happy being bonded with one other person. Carbon laughs at both of them and says, you guys don't know how to have fun, I regularly do four at a time.