I was just wondering if it were possible to A) Orbit the moon and earth B) To orbit any two celestial bodies really?
The simple answer is yes.
The more complicated answer starts to look at types of orbit.
Some may be stable, others not. In fact the free-return trajectory for Apollo 8, 10 and 11 is an unstable version of the first one. It is a figure-8 that goes out past the moon and comes back. But only once.
Have a read of @TildalWave's post for more info on resonant orbits.
And an example I love - the Apollo 12 fragment (from Wikipedia):