Almost everything about Penny and Leonard's relationship makes no sense. After 12 seasons of bazingas, derision, sarcasm, and fandom, The Big Bang Theory came to an end, as most fans of the show already know. It was full of heartfelt and heartbreaking moments, lives transformed by marriages and children, and dramatic rise and fall of relationships.

With as many episodes as the show aired, it is perhaps inevitable that some characters, storylines, and scenes did not make much sense at times. Leonard and Penny's relationship is one such storyline. Fans often choose to ignore things about the relationship that made no sense because they love the characters.

Penny and Leonard took a long and often humorous road to happiness, but many things about their relationship do not add up. Let's take a look at some of the things about this relationship that made zero sense.

14 Penny's Former Boyfriend Beat Up Both Leonard And Sheldon

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Leonard would endure anything to prove that he was worthy of Penny's friendship. After breaking up with her boyfriend, Penny was hoping to get her TV back from him. Trying to be her knight in shining armor, Leonard volunteered to go get it for her. Unfortunately, he and Sheldon ended up receiving wedgies and losing their pants in the process.

13 Leonard Married Penny Before Learning Her Last Name?

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Before you tie the knot with someone, you need to know their last name at the very least. One of the biggest secrets kept hidden since the first episode of The Big Bang Theory was Penny's maiden name. Although her parents appeared on screen, the show kept their family name hidden. Leonard actually married her before knowing her last name.

12 Penny Was Not Jealous When Leonard Kissed Another Woman

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Leonard knew that he was lucky to have Penny in his life. This is why it is strange that he would risk his relationship with her by kissing another woman during his sea expedition. Even stranger, after confessing to Penny on the way to their wedding in Vegas, she seemed not to care. Why did she not get pissed off?

11 They Are Divided On The Issue Of Kids

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Before getting married, it is important to settle on the most important things, one of those being children. Penny wants to focus on her career and wait until later to start a family, while Leonard is ready to have kids as soon as possible.

RELATED: 15 Reasons Why Penny Is The Worst 'Big Bang Theory' Character

10 Leonard And Most Of The Gang Often Put Penny Down

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Leonard and most of the show's leading characters had a tendency to belittle Penny because of her perceived lack of intelligence. This makes it somewhat strange that Penny and Leonard were together. They made numerous cracks about Penny's intellect throughout The Big Bang Theory's run, but she also got in her own cracks about Leonard's perceived social norms.

9 Penny Missed One Of Leonard's Marriage Proposals

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Leonard was always open about his feelings for Penny. Thanks to his emotional nature, he tended to express his feelings louder than other people did. He went overboard when he felt it was time to propose marriage to Penny; however, she did not always meet him halfway. He proposed multiple times, but she actually missed one of his proposals.

8 Leonard Called Penny Stupid

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One of the biggest differences between Leonard and Penny is their level of interest in academics. Instead of making her understand that her level of education didn't matter to him, he once called her unintelligent. How could Penny marry someone who clearly thinks so little of her?

7 Their Very First Date Took Place Under False Pretenses

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Leonard couldn't find the courage to ask Penny out so he organized a gathering with the group and invited Penny... little did she know that the gang wasn't going to be present at all and it would be just the two of them. It's hard to say a relationship is healthy when the couple's first date took place under false pretenses.

RELATED: Big Bang Theory: 20 Pics Of Penny's Transformation Through The Years

6 She Lets Ex-Boyfriends Stay At Her Place

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Given Leonard's insecurities and inexperience with relationships, he was extremely jealous when other men spent time with Penny. Even when they are doing something quite innocent, he will still lose his cool. However, Penny did not consider his feelings when making decisions, such as inviting her ex-boyfriend, Justin, to stay at her apartment for a week.

5 Leonard Did Not Believe In Penny's Acting Career

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Penny was not a successful actress; however, as her boyfriend, Leonard should have been more supportive of her. When Penny quit her job at the Cheesecake Factory to concentrate on her acting career, Leonard feigns support but is extremely worried. Although his anxiety is valid, he forgets to support Penny in the slightest.

4 Leonard Consoles Her After Break-Ups With Other Men

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Having a good relationship with a former partner is a great idea; however, when you are still harboring feelings for them, it will complicate things. Leonard still has feelings for her despite each of them going out with other people. While some may commend him for comforting her while she is upset about other men, it still makes little sense.

RELATED: 18 Photos Of Penny, Bernadette And Amy That Make Us Miss Big Bang Theory

3 It Took Her 6 Seasons To Say "I Love You"

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Penny had plenty of experience with other men before Leonard; however, she was very stubborn when it came to expressing her love for him. This must have been extremely frustrating for Leonard considering how early on he confessed his feelings to her. By the time she said the words, they had been in an on and off relationship for years.

2 Penny Was Already Married To Zack

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During their relationship, Leonard was once unfaithful to Penny, but he confessed to her and got forgiveness before they finally tied the knot. However, Penny's indiscretion was more complicated. During one of the times she and Leonard were broken up, she and her boyfriend, Zack, had taken a trip to Las Vegas and had a drive-through wedding they thought was not real.

1 Penny Had Tons More Experience Than Leonard

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Before getting married to Leonard, Penny had gone through numerous relationships. According to Sheldon's computations, she must have dated about 193 men. While that number is unlikely, Leonard, still has significantly less experience in the dating realm. This must be frustrating for both of them.

NEXT: 15 Of Our Most Favorite Penny-Leonard Moments From 'Big Bang Theory'