More: 14 times Raj & Howard of TBBT were the most important relationship on TVД«efore you go, check out our slideshow below.My pre-order formal dress has arrived but I am unable to pick it up. The Big Bang Theory moves to Thursdays at 8/7c on CBS starting Oct. Over the course of 10 seasons, fans sure have learned a lot about Sheldon Cooper, havenвЂ™t they? He also admitted that people he invited would never show up, but that didnвЂ™t bother him so much, unlike being tortured by his sisterвЂ™s friends on his birthday. Before changing his mind and allowing Amy to throw him a party, Sheldon confessed that the reason he hates his birthday is because when he was younger all of his twin sisterвЂ™s friends would tease him constantly at their party. Sheldon doesnвЂ™t like presents, celebrations or surprises, which is why he was so against celebrating his birthday in the 200th episode. When he opened up about why he hates his birthday ItвЂ™s hard for Sheldon to understand emotions and social cues, which is why heвЂ™d want to be a mind reader - then he wouldnвЂ™t feel so stressed about being around people. He wished he could read minds, so he wouldnвЂ™t feel so out of the loop about how people are feeling, what they really mean or what theyвЂ™re trying to tell him. While asking each other questions to get to know each other better, Sheldon revealed the one ability heвЂ™d want to have. When he revealed the one ability heвЂ™d love to possess However, Santa didnвЂ™t do that, and Sheldon has never looked at Santa or the holiday the same way again. Apparently, when he was a little boy, Sheldon asked Santa to bring back his grandfather (aka вЂњPop-PopвЂќ) who had just died that same year because he missed him. ItвЂ™s no secret that Sheldon hates Christmas and his hatred was finally explained in Season 6. When he opened up about his hatred of Christmas Then, he even admitted that there was a possibility he would one day have sex with Amy. Sheldon let his guard down and explained to Penny that heвЂ™s always been uncomfortable with any type of physical contact, including just a handshake.

Though, one of the more eye-opening moments was before they consummated their relationship. SheldonвЂ™s never been a physical or intimate person, but that all changed when he and Amy finally had sex for the first time.

When he explained why he hadnвЂ™t had sex with Amy yet Of course, she made the situation better by not judging him and letting him know that whenever he wants to possibly throw some things out, sheвЂ™ll be there. ItвЂ™s something heвЂ™s never told anyone and is ashamed of, so it was surprising to see him make such a confession to Amy. In Season 9, Sheldon showed Amy his secret storage locker where he has kept every single thing heвЂ™s ever owned, including old toothbrushes. When he confessed to Amy this major secret More: Does anyone else wish PennyвЂ™s brother was a recurring character on TBBT ? 1. With that, here are a few moments when weвЂ™ve gotten to know more about Sheldon as both a character and a person. ItвЂ™s always interesting to learn more about him and why he is the way he is because he is such a unique and sometimes guarded character. Like with the knocking, there have been several other times when Sheldon has let others in. Those are the moments you canвЂ™t help but sympathize with him. Occasionally, he opens up about why he is the way he is or confesses something about himself he may be ashamed about. As he told Penny, вЂњThe first oneвЂ™s traditional, but two and three are for people to get their pants on.вЂќДЄs annoying as Sheldon can be sometimes and whether or not you consider yourself a fan of his, there are times that heвЂ™s relatable.

Since that devastating moment, Sheldon now knocks three times just to make sure heвЂ™s not walking in on something that he shouldnвЂ™t see, doesnвЂ™t want to see or something that will upset him. In a confession to Penny, Sheldon explained that when he was just 13, he walked in on his dad having sex with another woman while his mom was at Bible study.

Knocking three times in a row is one of SheldonвЂ™s many quirks, and the reason behind it is actually quite heartbreaking. More: Bernadette is truly the unsung feminist hero of The Big Bang Theory

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