What is a 'Soulmate?'

Based on a question posed by Bobo, the gang discussed the concept of a "soulmate," and each had a different take: Howard didn't believe in the idea, as he thought it was possible to make a relationship work with any number of people. Robin laughed that "anyone you meet" was her favorite definition. Artie just wanted his soulmate to stay as far away from him as possible, adding that the conversation proved just how improbable it was that your high school sweetheart could be the only one you're meant to be with.