Howard Wolowitz and Rajesh Koothrappali are best friends, though at times their relationship can be viewed as a little odd.
When Raj first moved to California he had no friends until he met Howard. The pair formed a close bond and became inseparable, even going to couples therapy. The pair start a band together and even go disco dancing together.
Though at times the pair struggle with boundaries. After Howard gets married his wife Bernadette struggles with how close the pair are. Raj is always there and involved.
Though their friendship isn't perfect. Howard has a habit of putting down Raj and making fun of him. At times Raj feels like Howard takes him for granted and the pair have a falling out. It takes a bouncy castle at Halley's birthday party for the friends to make up.
Howard and Raj might have at times a weird friendship but do you remember all the unusual things they each got up to?
Will you remember who "struggled" with Batman? Do you know which of the pair used Penny's loofah?
Let's see if you can identify if either Howard or Rajesh did each of these 12 things?